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).
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
Amadeus III, Count of Savoy  b. abt. 1092, d. 1148
Arnulf Saint  b. abt. 13 Aug 582, d. 16 Aug 640
Bernard II, Duke of Saxony  b. 995, d. 1059
Berthe  d. aft. 720
Boleslas III  d. 1138
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
Conan I, Duke of Brittany  d. 27 Jun 992
Dagobert I, King of the Franks  b. abt. 603, d. 19 Jan 639
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
Ealdred  d. 1038
Ealdred  d. aft. 926
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
Eudes I, Count  b. 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
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, King of England  b. 1 Oct 1207, d. 16 Nov 1272
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
Ingelgar  d. abt. 885
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
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 West Franks  b. 1 Nov 846, d. 10 Apr 879
Louis IV "d'Outremer," King of France  b. 919, d. 10 Sep 954
Malcolm III, King of Scots  b. 1031, d. 13 Nov 1093
Margaret Saint  b. 1045, d. 16 Nov 1093
Munia "Mayor," Countess of Castile  b. abt. 996, d. aft. 13 Sep 1065
Odo, Count of Savoy  d. bef. 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
Pons III, Count of Toulouse  b. 991, d. 1060
Pépin "Carloman," King of Italy  b. 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
Robert "the Old," Duke of Burgundy  b. bt 1010 - 1015, d. 18 Mar 1075/76
Robert II "the Pious," King of France  b. bt 970 - 974, d. 20 Jul 1031
Sancho III, King of Navarre  b. abt. 992, d. 18 Oct 1035
Stephen II  d. 1101
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
Waltheof II  d. 31 May 1076
Wigeric, Count of Trier  d. bt 19 Jan 916 - 13 Jun 919
William III, Duke of Aquitane  b. 925, d. 3 Apr 963
William King of England  b. 1027, d. 9 Sep 1087
William VIII, Count of Poitou  b. 1099, d. 9 Apr 1137
Ælfgifu Saint  d. 18 May 944
Ælfred "the Great," King of England  b. bt 848 - 849, d. 26 Oct 900
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
Aquitaine, Eleanor of  b. 1123, d. 1 Apr 1204
Aragon, Petronilla of  b. 1135, d. 13 Oct 1173
Arles, Constance of  b. bt 985 - 990, d. 25 Jul 1034
Beaumont, Robert de Sir, Count of Meulan  b. abt. 1049, d. 5 Jun 1118
Berenger, Ramon II, Count of Barcelona  b. abt. 1053/54, d. 5 Dec 1082
Bibar, Rodrigo Diaz de  b. 1043, d. 10 Jul 1099
Bonnet, Stede  b. 29 Jul 1687, d. 10 Dec 1718
Brus, Robert de  d. bef. 23 Jan 1225/26
Brus, Robert de  b. abt. 1216, d. 31 Mar 1295
Brus, Robert de  b. Jul 1243, d. bef. 4 Apr 1304
Brus, Robert de  b. 11 Jul 1274, d. 7 Jun 1329
Bush, George Walker  b. 6 Jul 1946
Capet, Hugues, King of France  b. say 940, d. abt. 24 Oct 996
Carter, James Earl Jr.  b. 1 Oct 1924
Castile, Berenguela of  b. abt. 1179, d. 8 Nov 1246
Castile, Eleanor of  b. abt. 1241, d. 28 Nov 1290
Chilton, Mary  b. 31 May 1607, d. bef. 1 May 1679
Cleveland, Steven Grover  b. 18 Mar 1837, d. 24 Jun 1908
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
d'Abetot, Urse  d. 1118
Dentatus, Hamo  d. 1047
DeSaussure, Henry William  b. 16 Aug 1763, d. 26 Mar 1839
Despenser, Hugh le Sir, Knt.  b. aft. 1287, d. 24 Nov 1326
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
Dymoke, Thomas Sir, Knt.  b. abt. 1428, d. 12 Mar 1470
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
FitzJohn, Eustace  b. bef. 1100, d. 1157
Floyd, William  b. 17 Dec 1734, d. 4 Aug 1821
Ford, Gerald Rudolph Jr.  b. 14 Jul 1913, d. 26 Dec 2006
Garfield, James Abram  b. 19 Nov 1831, d. 19 Sep 1881
Geer, Thomas  b. 1623, d. 14 Jan 1722
Germany, Agnes of  b. 1052/53, 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. 1090
Grandmesnil, Hugh de  d. 22 Feb 1098
Grant, Ulysses S.  b. 27 Apr 1822, d. 23 Jul 1885
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
Iorwerth, Llywelyn ap  b. 1173, d. 11 Apr 1240
Jones, Joseph Marion  b. 20 Mar 1810, d. 3 Apr 1883
Kiev, Anne of  b. 1036, d. 1075
Lascelles, Francis Colonel  b. 5 Aug 1612, d. bef. 28 Nov 1667
León, Sancha of  b. 1014, d. 5 Mar 1067
Lothrop, John Reverend  b. 20 Dec 1584, d. 8 Nov 1653
Malet, William  b. abt. 1175, d. bef. 1219
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
Mullins, Priscilla  b. bt 1600 - 1605, d. aft. 1650
Narvarre, Blanche of, Countess of Champagne  b. bef. 5 Aug 1179, d. Mar 1229
Nixon, Richard Milhous  b. 9 Jan 1913, d. 22 Apr 1994
Peters, Hugh Rev  b. 11 Jun 1598, d. 16 Oct 1660
Plantagenet, Geoffrey Sir, Knt.  b. 24 Aug 1113, d. 7 Sep 1151
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
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.  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
Stephens, Joseph Rev.  b. abt. 1761, d. 2 May 1847
Stewart, John  b. abt. 1337, d. 4 Apr 1406
Stewart, Robert  b. 2 Mar 1315/16, d. 19 Apr 1390
Stewart, Walter  b. abt. 1297, d. 9 Apr 1327
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
Verdun, Ida of  d. 13 Aug 1113
Vere, Aubrey II de  b. bef. 1080, d. 15 May 1141
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
Wilson, William  d. aft. 1693
Wynyard, John  d. 20 Jan 1605/6