Some of our ancestors (or events they are associated with, such as battles) have entries on Wikipedia. Most are related to English and European royalty. As I find them, or other Internet sources of biographical notes, I'll add them here, and on their individual pages as links, to avoid duplicating the work of others (and copyright infringement).
Adela, Duchess of Turin and Margravine of Susa  b. abt. 1015, d. 27 Dec 1091
Adelaide Saint  b. bt 931 - 932, d. 17 Dec 999
Alexander II, King of Scots  b. 24 Aug 1198, d. 8 Jul 1249
Alfonso IX, King of Leon  b. 1171, d. 24 Sep 1230
Alfonso V, Emperor of Spain  b. 994, d. 5 May 1027
Alfonso VI, Emperor of Spain  b. Jun 1040, d. 30 Jun 1109
Almos, Prince of Croatia  b. bt 1070 - 1075, d. 1 Sep 1127
Amadeus III, Count of Savoy  b. abt. 1092, d. 1148
Andras II, King of Hungary  b. 1176, d. 21 Sep 1235
Arnulf Saint  b. abt. 13 Aug 582, d. 16 Aug 640
Bela IV, King of Hungary  b. 1206, d. 3 May 1270
Bernard II, Duke of Saxony  b. 995, d. 1059
Berthe  d. aft. 720
Bohemond II, Prince of Antioch  b. abt. 1107, d. 1130
Boleslaw I "the Cruel," Duke of Bohemia  b. abt. 905, d. 15 Jul 967
Charles, duke of Lower Lorraine  b. 953, d. aft. 30 Mar 991
Cináed mac Alpín  d. 8 Feb 858
Clothilde Saint  b. 474, d. 545
Clovis I, King of Franks  b. 466, d. 511
Clovis II, King of Austrasia  b. 634, d. 27 Nov 658
Constance of Antioch  b. abt. 1127, d. 1163
Dagobert I, King of the Franks  b. abt. 603, d. 19 Jan 639
Drahomira  d. aft. 935
Dulce of Aragon  b. 1160, d. 1 Sep 1198
Eadgar, King of England  b. 943, d. 8 Jul 975
Eadmund "Ironside," King of England  b. bt 988 - 996, d. 30 Nov 1016
Eadward  b. 1016, d. 1057
Eadwulf  d. 918
Eahlmund, King of Kent  d. aft. 784
Ealdred  d. 1038
Edmund of Langley, K.G., 1st Duke of York Sir  b. 5 Jun 1341, d. 1 Aug 1402
Edward I "Longshanks," King of England  b. 17 Jun 1239, d. 8 Jul 1307
Edward II, King of England  b. 25 Apr 1284, d. 21 Sep 1327
Edward III, King of England  b. 13 Nov 1312, d. 21 Jun 1377
Edward IV, King of England  b. 28 Apr 1442, d. 9 Apr 1483
Egaldith  b. abt. 1025, d. abt. 1086
Eiludd of Powys  d. abt. 642
Eleanor of Aquitaine  b. abt. 1124, d. 31 Mar 1204
Eleanor of Castile  b. abt. 1241, d. 28 Nov 1290
Elizabeth of Aragón Saint  b. 4 Jan 1271, d. 4 Jul 1336
Eudes I, Count of Blois  b. abt. 950, d. 12 Mar 996
Eudes II, Count  b. 990, d. 15 Nov 1037
Fernando I, Emperor of Spain  b. 1019, d. 27 Dec 1065
Fernando III, King of Castile Saint  b. 5 Aug 1201, d. 30 May 1252
Foulques II "le Bon," Count of Anjou  d. bt Sep 958 - Sep 960
Fulk I, Count of Anjou  d. aft. 13 Aug 941
Fulk III "Nerra," Count of Anjou  b. bt 965 - 970, d. 21 Jun 1040
Fulk IV "le Rechin," Count of Anjou  b. 1043, d. 14 Apr 1109
Gospatrick II, Earl of Dunbar  d. bef. 16 Aug 1139
Gozelo I, duke of Lorraine  b. aft. 962, d. 19 Apr 1044
Guillaume II, Count of Provence  b. abt. 981, d. 4 Mar 1019
Gunnor  d. bt 1027 - 1031
Guy I, Count of Ponthieu  d. 13 Oct 1100
Harold II "Godwinson," King of England  b. abt. 1022, d. 14 Oct 1066
Henry I "the Fowler," King of Germany  b. abt. 876, d. 2 Jul 936
Henry I, King of France  b. bef. 17 May 1008, d. 4 Aug 1060
Henry II, King of England  b. 5 Mar 1132/33, d. 6 Jul 1189
Henry III "the Black," Holy Roman Emperor  b. 28 Oct 1017, d. 5 Oct 1056
Henry III, King of England  b. 1 Oct 1207, d. 16 Nov 1272
Hugh "Kevelioc," 6th Earl of Chester  b. abt. 1141, d. 30 Jun 1181
Hugh II, Count of Ponthieu  b. abt. 1035, d. 1052
Hugh III, Count of Maine  b. bef. 967, d. aft. 1015
Hugues "le Grand," Duke of the Franks  b. say 898, d. abt. 17 Jun 956
Iago, king of Gwynedd  d. abt. 616
Ingelgar  d. abt. 885
Isabel of Castile-Leon, Duchess of York  b. 1355, d. 23 Dec 1392
Jaroslav I  b. bef. 1015, d. bt 20 Feb 1053 - 1054
John "Lackland," King of England  b. abt. 27 Dec 1167, d. 19 Oct 1216
John of Gaunt, K.G., Duke of Lancaster, etc. Sir  b. Mar 1340, d. 3 Feb 1398/99
Leofric  d. 31 Aug 1057
Leofwine  d. 1028
Louis I "the Pious," Emperor  b. Aug 778, d. 20 Jun 840
Louis II "the Stammerer," King of France  b. 1 Nov 846, d. 10 Apr 879
Louis IV "d'Outremer," King of France  b. 919, d. 10 Sep 954
Ludmila of Bohemia  b. abt. 860, d. 15 Sep 927
Luitgarde  b. abt. 931, d. 18 Nov 953
Mahaut of Portugal  b. 1151, d. 1218
Malcolm III, King of Scots  b. 1031, d. 13 Nov 1093
Manfredo III, Marquis of Saluzzo  b. abt. 1205, d. bef. 12 Oct 1244
Margaret of Scotland Saint  b. 1045, d. 16 Nov 1093
Mieszko I of Poland  b. abt. 930, d. 25 May 992
Morggán, Earl of Mar  d. bt 1178 - 30 Mar 1183
Munia "Mayor," Countess of Castile  b. abt. 996, d. aft. 13 Sep 1065
Odo, Count of Savoy  d. 1 Mar 1060
Olga Saint  d. 969
Ordoño I, King of Asturias  b. abt. 821, d. 27 May 866
Ordoño III, King of León  b. abt. 926, d. bef. 13 Nov 955
Otte-Guillaume, Count of Burgundy  b. bef. 962, d. bef. 21 Sep 1027
Otto I "the Great," Holy Roman Emperor  b. 23 Nov 912, d. 7 May 973
Pedro I "the Cruel," King of Castile  b. 30 Aug 1334, d. 23 Mar 1369
Pons III, Count of Toulouse  b. 991, d. 1060
Pépin "Carloman," King of Italy  b. 15 Apr 773, d. 8 Jul 810
Ralph II, seigneur of Toeni & Conches  b. bef. 970, d. aft. 1015/16
Ramiro I, King of Asturias  b. abt. 790, d. 1 Feb 850
Ramiro II, King of León  b. abt. 900, d. 5 Jan 951
Richard I  b. aft. 922, d. 21 Nov 996
Richard of York, Knt., 3rd Earl of Cambridge Sir  b. 20 Jul 1385, d. 5 Aug 1415
Robert "the Old," Duke of Burgundy  b. bt 1010 - 1015, d. 18 Mar 1075/76
Robert I "le Grand," Count of Dreux and Braine  b. abt. 1123, d. 11 Oct 1188
Robert II "the Pious," King of France  b. bt 970 - 974, d. 20 Jul 1031
Robert III, Chev., Count of Dreux and Braine  b. abt. 1190, d. 3 Mar 1233/34
Sancho III, King of Navarre  b. abt. 992, d. 18 Oct 1035
Stephen II  d. 1101
Stephen of Blois, King of England  b. abt. 1092, d. 25 Oct 1154
Stephen V, King of Hungary  b. Dec 1239, d. 1 Aug 1272
Thibaud III, Count of Champagne  b. 13 Jan 1179, d. 24 May 1201
Vermudo II "the Gouty," King of Leon  b. abt. 953, d. Sep 999
Vladimir I Saint  d. 15 Jul 1015
Vladislas II  d. 1159
Wigeric, Count Palatine of Lotharingia  d. bt 19 Jan 916 - 13 Jun 919
William II  b. abt. 937, d. 3 Apr 995
William III, Duke of Aquitane  b. 925, d. 3 Apr 963
William IV, Count of Mácon  b. bt 1090 - 1095, d. 1155
William V "the Great," Duke of Aquitaine  b. abt. 969, d. 31 Jan 1030
William X, Duke of Aquitaine  b. 1099, d. 9 Apr 1137
Ælfgifu  d. bef. 1002
Ælfgifu Saint  d. 18 May 944
Ælfred "the Great," King of England  b. bt 848 - 849, d. 26 Oct 900
Æthelred I, king of Wessex  b. say 847, d. 23 Apr 871
Adams, John  b. 30 Oct 1735, d. 4 Jul 1826
Adams, John Quincy  b. 11 Jul 1767, d. 23 Feb 1848
Alden, John  b. abt. 1598, d. 12 Sep 1687
Amsden, Isaac  b. 1655, d. 3 May 1727
Angelos, Constantine  b. abt. 1093, d. aft. 1166
Aragon, Petronilla of  b. 1135, d. 13 Oct 1173
Arles, Constance of  b. bt 985 - 990, d. 25 Jul 1034
Arundel, Edmund de Sir, Knt., 9th Earl of Arundel  b. 1 May 1285, d. 17 Nov 1326
Baudement, Agnés de, Countess of Braine  b. abt. 1130, d. 24 Jul 1204
Beaumont, Robert de Sir, Count of Meulan  b. abt. 1049, d. 5 Jun 1118
Berenguer, Ramón II, Count of Barcelona  b. abt. 1053/54, d. 5 Dec 1082
Bergundy, Bertha of  b. abt. 965, d. aft. 1010
Bonnet, Stede  b. 29 Jul 1687, d. 10 Dec 1718
Brewes, John de, lord of Gower  b. abt. 1197, d. bef. 16 Jul 1232
Brus, Robert de  d. bef. 23 Jan 1225/26
Brus, Robert de  b. abt. 1216, d. 31 Mar 1295
Brus, Robert de Sir, Knt., Earl of Carrick  b. Jul 1243, d. bef. 4 Apr 1304
Bush, George Herbert Walker  b. 6 Jul 1924, d. 30 Nov 2018
Bush, George Walker  b. 6 Jul 1946
Cadell, Nest ferch  d. abt. 808
Capet, Hugh Count of Vermandois  b. abt. 1057, d. 1101
Capet, Hugues, King of France  b. say 940, d. abt. 24 Oct 996
Carter, James Earl Jr.  b. 1 Oct 1924
Chilton, Mary  b. 31 May 1607, d. bef. 1 May 1679
Châtillon, Agnès de  b. abt. 1154, d. abt. 1184
Châtillon, Renaud de, Chev.  d. aft. 4 Jul 1187
Cleveland, Steven Grover  b. 18 Mar 1837, d. 24 Jun 1908
Constable, Robert  b. abt. 1478, d. 1537
Cook, George Hammell  b. 5 Jan 1818, d. 22 Sep 1889
Cooke, Francis  b. Aug 1583, d. 7 Apr 1663
Coolidge, John Calvin Jr.  b. 4 Jul 1872, d. 5 Jan 1933
Cynan, Selyf ap  d. abt. 616
d'Abetot, Urse  d. 1118
Dalassene, Anne  b. bt 1025 - 1030, d. bt 1100 - 1102
Dalassenos, Damian  b. abt. 940, d. 19 Jul 998
Dalassenos, Theophylact  b. abt. 990, d. aft. 1039
Ddyrnllwg, Cadel  d. abt. 460
Dentatus, Hamo  d. 1047
Douglas, Archibald Sir, Knt.  b. abt. 1297, d. 19 Jul 1333
Douglas, George, 1st Earl of Angus  b. bt 1378 - 1380, d. 1403
Douglas, William Sir, Knt., 1st Earl of Douglas  b. abt. 1330, d. bef. 24 Apr 1384
Ferrers, William de Sir, Knt., 5th Earl of Derby  b. abt. 1193, d. 28 Mar 1254
Fillmore, Millard  b. 7 Jan 1800, d. 8 Mar 1874
FitzGilbert, John  b. bef. 1109, d. bef. 1166
FitzJohn, Eustace  b. bef. 1100, d. 1157
Foljambe, Godfrey Sir, Knight of the shire  b. abt. 1310, d. 29 May 1376
Ford, Gerald Rudolph Jr.  b. 14 Jul 1913, d. 26 Dec 2006
Garfield, James Abram  b. 19 Nov 1831, d. 19 Sep 1881
Garwyn, Cynan  d. abt. 600
Geer, Thomas  b. 1623, d. 14 Jan 1722
Germany, Agnes of  b. 1072/73, d. 24 Sep 1143
Giffard, Walter II, 1st Earl of Buckingham  b. abt. 1015, d. 15 Jul 1102
Gilbert, Richard Fitz  b. bt 1030 - 1035, d. 1089 or 1090
Glodrydd, Cyngen  d. abt. 500
Grandmesnil, Hugh de  d. 22 Feb 1098
Grant, Ulysses S.  b. 27 Apr 1822, d. 23 Jul 1885
Grey, Anschetil de  d. bt 1088 - 1100
Harding, Warren Gamaliel  b. 2 Nov 1865, d. 2 Aug 1923
Harrison, Benjamin  b. 20 Oct 1833, d. 13 Mar 1901
Harrison, William Henry  b. 9 Feb 1773, d. 4 Apr 1841
Hayes, Rutherford Birchard  b. 4 Oct 1822, d. 17 Jan 1893
Holburne, Francis Admiral  b. 1704, d. 15 Jul 1771
Hoover, Herbert Clark  b. 10 Aug 1874, d. 20 Nov 1964
Hungerford, Robert Sir, Knt., 2nd Lord Hungerford  b. bt 1409 - 1413, d. 18 May 1459
Hungerford, Walter Sir, K.G., K.B., 1st Lord Hungerford  b. abt. 22 Jun 1378, d. 9 Aug 1449
Iorwerth, Llywelyn ap  b. 1173, d. 11 Apr 1240
Jefferson, Thomas  b. 2 Apr 1743, d. 4 Jul 1826
Jones, Joseph Marion  b. 20 Mar 1810, d. 3 Apr 1883
Kiev, Anne of  b. 1036, d. bt 1075 - 1078
Lascelles, Francis Colonel  b. 5 Aug 1612, d. bef. 28 Nov 1667
León, Sancha of  b. 1014, d. 5 Mar 1067
Longespée, William Sir, Knt.  b. say 1208, d. 7 Feb 1249/50
Longespée, William Sir, Knt., Earl of Salisbury  b. bt 1175 - 1180, d. 7 Mar 1225/26
Lothrop, John Reverend  b. 20 Dec 1584, d. 8 Nov 1653
Lumley, Ralph Sir, Knt., 1st Lord Lumley  b. abt. 1360, d. 5 Jan 1399/0
Madison, James  b. 5 Mar 1750/51, d. 28 Jun 1836
Malet, William  b. bef. 1173, d. abt. 1216
Martel, Charles, Duke of Austrasia  b. 689, d. 22 Oct 741
Menendez, Elvira  b. abt. 996, d. 3 Dec 1022
Menteith, John Sir, Knt.  d. abt. 1323
Mortimer, Roger de Sir, K.G., Marshal of England  b. 11 Nov 1328, d. 26 Feb 1359/60
Mortimer, Roger de Sir, Knt.  b. 3 May 1286, d. 29 Nov 1330
Mullins, Priscilla  b. bt 1600 - 1605, d. aft. 1650
Muñoz, Jimena  d. 1128
Narvarre, Blanche of, Countess of Champagne  b. bef. 5 Aug 1179, d. Mar 1229
Neville, Cecily  b. 3 May 1415, d. 31 May 1495
Nixon, Richard Milhous  b. 9 Jan 1913, d. 22 Apr 1994
Obama, Barack Hussein  b. 4 Aug 1961
Percy, Henry Sir K.G., K.B.  b. 30 May 1364, d. 21 Jul 1403
Peters, Hugh Rev  b. 11 Jun 1598, d. 16 Oct 1660
Plantagenet, Richard Sir, K.G., 3rd Duke of York  b. 22 Sep 1411, d. 30 Dec 1460
Poland, Richilde of  b. abt. 1135, d. 16 Oct 1185
Pole, Michael de la, 1st Earl of Suffolk  b. abt. 1330, d. 5 Sep 1389
Pole, William de la  d. 13 Jun 1366
Provence, Geoffrey of  b. 1007, d. 1061
Ramierez, Velasquita  d. aft. 1024
Roet, Gilles dit Paonet de  b. abt. 1310, d. 1380
Roet, Katherine de  b. 1350, d. 10 May 1403
Roosevelt, Franklin Delano  b. 30 Jan 1882, d. 12 Apr 1945
Roosevelt, Theodore Jr.  b. 27 Oct 1858, d. 6 Jan 1919
Salford, Peter de Sir, Knt.  d. bt 1375 - 1381
Savage, John Sir, Knt.  b. aft. 1377, d. 1 Aug 1450
Schweinfurt, Heinrich, Margrave  b. 975, d. 18 Sep 1017
Sexton, Charles  b. 27 Jan 1708, d. 16 Sep 1762
Soule, George  b. bef. 1600, d. bef. 22 Jan 1679
Stewart, John Sir Knt., King of Scots  b. abt. 1337, d. 4 Apr 1406
Stewart, Robert II Sir, Knt., King of Scots  b. 2 Mar 1315/16, d. 19 Apr 1390
Taft, William Howard  b. 15 Sep 1857, d. 8 Mar 1930
Tibetot, Pain de Sir, Knt.  b. 11 Nov 1279, d. 24 Jun 1314
Toeni, Ralph III  b. bt 1025 - 1030, d. 24 Mar 1101/2
Tosny, Roger I of  b. abt. 990, d. bef. 31 May 1039
Tracy, William de Sir, Knt.  d. aft. 25 Mar 1171
Truman, Harry S  b. 8 May 1884, d. 26 Dec 1972
Verdun, Ida of  d. 13 Aug 1113
Vere, Aubrey II de  b. bef. 1080, d. 15 May 1141
Vibar, Rodrigo Diaz de  b. 1043, d. 10 Jul 1099
Walling, John  b. 27 Jul 1750, d. 22 Apr 1836
Warren, Richard  b. say 1578, d. 1628
Washington, George  b. 11 Feb 1731/32, d. 14 Dec 1799
Westphalia, Mathilda of  b. say 895, d. 14 Mar 968
Wilington, Henry de  d. aft. 16 Mar 1322
Willington, Henry  d. aft. 16 Mar 1322
Willoughby, Richard Sir, M.P.  b. abt. 1290, d. 14 Mar 1362
Wilson, William  d. aft. 1693
Woodstock, Edmund of, 1st Earl of Kent  b. 5 Aug 1301, d. 19 Mar 1329/30
Wynyard, John  d. 20 Jan 1605/6
Ysgithrog, Brochwel  d. abt. 560