| Names | Born | Died | 
| IBBOTSON |  |  | 
| Elizabeth [1444] | born Goderich, Huron, Ontario, Canada |  | 
| IM ARGENGAU |  |  | 
| Ruthard der Jüngere (Graf) [7656] | born 748, Austrasia | died Abt 776 | 
| IM THURGAU |  |  | 
| Isanbart (Graf) [7661] | born Abt 750, Thurgau, Frankenreich | died 807, Saxony, Germany | 
| IMBROGNO |  |  | 
| Maria [3242] |  | died 4 June 2016, Tinley Park, Cook, Illinois, United States | 
| IN DER ARGENGAU |  |  | 
| Richbold [7663] | born Abt 690, , , , Germany | died 15 January 762 | 
| INCHMARTIN |  |  | 
| Isabel [6369] | born 1340, Inchmartine, Perthshire, Scotland | died 1399, Auchtertool, , Fife, Scotland | 
| John [6377] | born 1320, Perthshire, Scotland | died 17 October 1346, Ancroft, , Durham, England | 
| INCHMARTIN OF THAT ILK |  |  | 
| John (Sir) [6379] | born 1295, Perthshire, Scotland, United Kingdom | died 1346, , , , Scotland | 
| INFANTE |  |  | 
| Joey [5919] | 
| Rio [5917] | 
| Zoe [5920] | 
| INGEN KENNETH |  |  | 
| Tittensor [7064] | born Abt 1020, Dol, Normandy, France | died Abt 1089, Dol-de-Bretagne, , Bretagne, France | 
| INGEN MAÍL COLUIM MEIC CINÁEDA |  |  | 
| Bethóc [6448] | born 984, Atholl, , Perthshire, Scotland | died 15 September 1049, Dunkeld, , Perthshire, Scotland | 
| IRISH |  |  | 
| Brenda Kathleen [1620] | 
| IZZARD |  |  | 
| Alice [1675] | born 6 October 1918 | died 5 May 1998, <Stirlingville, Chippewa, Michigan, United States> |