| INGLEDESTHORPE, Sibilla spouse of Thomas II | | | | D. 1219 |
| INGLEDESTHORPE, Thomas II | | B. 1217 | | D. 1251 |
| INGOLDESTHORPE, John I | | B. 1240 | | D. 1283 |
| INGOLDESTHORPE, Katherine | | B. 1218 | | D. AFT 1243 |
| INGOLDESTHORPE, Thomas III | | B. 1235 | | D. 12 MAY 1291 |
| INGVARSSON, Unknown Spouse of Skirta | | B. ABT 630 | | |
| IOHANNES, Arscruni-Mystakon | | B. ABT 572 | | |
| IOHANNES, Arshakunki | | | | |
| IOHANNES, Florus Valentinian | | | | |
| IRVINE, Mary | | B. 1503 | | D. 1548 |
| IRWIN, Margaret | | B. 1522 | | |
| ISAIAH, Maher Shalal Hash Baz ben | | | | |
| ISHA HA YESHAYAHU BEN AMOTZ, Alma the Prophetess | | B. 750 BC | | |
| ISOBEL ASTON | | B. 1414 | | D. 1477 |
| ISRAEL, Solomon ben David of | | B. 990 BC | | D. 931 BC |
| ISTAKHR, Pabag of | | B. ABT 150 | | D. BET 207 AND 210 |
| ISTRIA, Hunfrid of | | | | D. 823 |
| ITALY, Adalbert II of | | | | |
| ITALY, Adelaide of | | B. 931 | | D. 16 DEC 999 |
| ITALY, Dode of | | | | |
| ITALY, Odoacer of | | B. 433 | | |
| IUDWAL, Iudhael ap | | | | |
| IULIANUS, Accius | | B. 125 | | |
| IULIUS, Gaius Iulius Asper Pansinianus | | B. 100 | | |
| IULIUS, Gaius Iulius Camilius Asper | | | | |
| IULIUS, Iulia | | B. 240 | | |
| IUNII NERATII, Nu | | B. ABT 300 | | |
| IUNII NERATII, Nu | | B. 270 | | |
| IVARSDATTER, Aud Deiphrandza | | B. 633 | | D. ABT 717 |
| IVARSSON, Jarl Eystein | | B. 788 | | D. 870 |