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).
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Diniz "el Justo," Knt., King of Portugal & The Algarve b. 9 Oct 1261, d. 7 Jan 1325
Dulce of Aragon b. 1160, d. 1 Sep 1198
Edmund of Langley, K.G., 1st Duke of York Sir b. 5 Jun 1341, d. 1 Aug 1402
Edward IV, King of England b. 28 Apr 1442, d. 9 Apr 1483
Elizabeth of Aragón Saint b. 4 Jan 1271, d. 4 Jul 1336
Isabel of Castile-Leon, Duchess of York b. 1355, d. 23 Dec 1392
John of Gaunt, K.G., Duke of Lancaster, etc. b. Mar 1340, d. 3 Feb 1398/99
Richard of York, Knt., 3rd Earl of Cambridge Sir b. 20 Jul 1385, d. 5 Aug 1415
Robert III, Chev., Count of Dreux and Braine b. abt. 1190, d. 3 Mar 1233/34
Sancho I "el Poblador," King of Portugal & The Algarve b. 11 Nov 1154, d. 26 Mar 1211
Adams, John b. 30 Oct 1735, d. 4 Jul 1826Adams, John Quincy b. 11 Jul 1767, d. 23 Feb 1848Amsden, Isaac b. 1655, d. 3 May 1727
Arundel, Edmund de Sir, Knt., 9th Earl of Arundel b. 1 May 1285, d. 17 Nov 1326
Banastre, Adam Sir, Knt. d. 1315
Bonnet, Stede b. 29 Jul 1687, d. 10 Dec 1718
Brus, Robert de Sir Knt., Earl of Carrick b. Jul 1243, d. bef. 4 Apr 1304
Brus, Robert de Sir, Knt., Earl of Carrick, King of Scots b. 11 Jul 1274, d. 7 Jun 1329
Bush, George Herbert Walker b. 6 Jul 1924, d. 30 Nov 2018Bush, George Walker b. 6 Jul 1946Carter, James Earl Jr. b. 1 Oct 1924Cleveland, Steven Grover b. 18 Mar 1837, d. 24 Jun 1908Constable, Robert b. abt. 1478, d. 1537
Cook, George Hammell b. 5 Jan 1818, d. 22 Sep 1889Coolidge, John Calvin Jr. b. 4 Jul 1872, d. 5 Jan 1933Douglas, 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
Douglas, William Sir, Knt., 2nd Earl of Angus b. say 1398, d. Oct 1437
Fillmore, Millard b. 7 Jan 1800, d. 8 Mar 1874Foljambe, Godfrey Sir, Knight of the shire b. abt. 1310, d. 29 May 1376
Ford, Gerald Rudolph Jr. b. 14 Jul 1913, d. 26 Dec 2006Garfield, James Abram b. 19 Nov 1831, d. 19 Sep 1881Gavaston, Peter de Sir, Knt., Earl of Cornwall d. 19 Jun 1312Grant, Ulysses S. b. 27 Apr 1822, d. 23 Jul 1885Grey, Anschetil de d. bt 1088 - 1100
Harding, Warren Gamaliel b. 2 Nov 1865, d. 2 Aug 1923Harrison, Benjamin b. 20 Oct 1833, d. 13 Mar 1901Harrison, William Henry b. 9 Feb 1773, d. 4 Apr 1841Hayes, Rutherford Birchard b. 4 Oct 1822, d. 17 Jan 1893Holburne, Francis Admiral b. 1704, d. 15 Jul 1771Hoover, Herbert Clark b. 10 Aug 1874, d. 20 Nov 1964Hungerford, Robert Sir, Knt., 2nd Lord Hungerford b. bt 1409 - 1413, d. 18 May 1459
Hungerford, Thomas Sir, Knt., Speaker of the House of Commons b. abt. 1325, d. 3 Dec 1397
Hungerford, Walter Sir, K.G., K.B., 1st Lord Hungerford b. abt. 22 Jun 1378, d. 9 Aug 1449
Jefferson, Thomas b. 2 Apr 1743, d. 4 Jul 1826Jones, Joseph Marion b. 20 Mar 1810, d. 3 Apr 1883
Keith, Edward Sir, Knt., Marischal of Scotland d. 17 Oct 1346
Lascelles, Francis Colonel b. 5 Aug 1612, d. bef. 28 Nov 1667
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 1836Menteith, John Sir, Knt. d. abt. 1323
Neville, Cecily b. 3 May 1415, d. 31 May 1495
Nixon, Richard Milhous b. 9 Jan 1913, d. 22 Apr 1994Obama, Barack Hussein b. 4 Aug 1961Percy, Henry Sir K.G., K.B. b. 30 May 1364, d. 21 Jul 1403
Peters, Hugh Rev b. 11 Jun 1598, d. 16 Oct 1660Plantagenet, Richard Sir, K.G., 3rd Duke of York b. 22 Sep 1411, d. 30 Dec 1460
Ramierez, Velasquita d. aft. 1024Roosevelt, Franklin Delano b. 30 Jan 1882, d. 12 Apr 1945Roosevelt, Theodore Jr. b. 27 Oct 1858, d. 6 Jan 1919Salford, Peter de Sir, Knt. d. bt 1375 - 1381
Savage, John Sir, Knt. b. aft. 1377, d. 1 Aug 1450
Sexton, Charles b. 27 Jan 1708, d. 16 Sep 1762
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
Stewart, Walter Sir, Knt., 6th Steward of Scotland b. abt. 1297, d. 9 Apr 1327
Taft, William Howard b. 15 Sep 1857, d. 8 Mar 1930Tracy, William de Sir, Knt. d. aft. 25 Mar 1171
Truman, Harry S b. 8 May 1884, d. 26 Dec 1972Walling, John b. 27 Jul 1750, d. 22 Apr 1836
Washington, George b. 11 Feb 1731/32, d. 14 Dec 1799Wilington, Henry de d. aft. 16 Mar 1322
Willington, Henry d. aft. 16 Mar 1322
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