Names | 
Born | 
Died | 
| IAGO | 
 | 
 | 
|   Cynan ap Prince of North WalesS,S,C,P,P,P | 
 | 
died 1060 | 
| IARDDUR | 
 | 
 | 
|   Madog ap of Penrhyn and CwchwillanC,P | 
 | 
 | 
| IDNERTH AB DAVID YSGYDEUR | 
 | 
 | 
|   Paradwen apC,P,P | 
 | 
 | 
| IDWAL | 
 | 
 | 
|   Iago ap King of GwyneddC,P,P | 
 | 
died 1039 | 
|   Meurig apC,P | 
 | 
 | 
| IEFAN | 
 | 
 | 
|   Madog Foel apS,P,P | 
 | 
 | 
| IENAF AP ADDA | 
 | 
 | 
|   Maud verchS,P,P | 
 | 
 | 
| IERWORTH AP EINION | 
 | 
 | 
|   Ednyfed apC,P,P | 
born Bef 1457 | 
 | 
| IERWORTH HEN | 
 | 
 | 
|   Ierworth Vychan apS | 
 | 
 | 
| IEUAF | 
 | 
 | 
|   Einion apC | 
 | 
 | 
|   Iorwerth ap of LlwynonnS,S,C,P,S,S,C,P | 
born Denbighshire, Wales | 
 | 
|   Madog Voel apS,P,P | 
 | 
 | 
| IEUAN | 
 | 
 | 
|   Goronwy ap of Havod y WernS,C,P,S,C,P | 
born Hafod-y-Wern, (Bersham, Wrexham, Denbighshire), Wales | 
 | 
|   Gruffydd Dew ab of LlanfendigaidC,P,P | 
 | 
 | 
|   Ieuan Fychan apP,P,P,P | 
born <Wiston>, Shropshire, England | 
 | 
| IEUAN AB LLYWELYN | 
 | 
 | 
|   Ieuan Lloyd Fychan abC,P,P | 
 | 
 | 
| IEUAN AP GRUFFUDD | 
 | 
 | 
|   Hywel ap of BershamS,S,C,P,P | 
born Bersham, (Denbighshire), Wales | 
 | 
| IEUAN AP GRUFFYDD | 
 | 
 | 
|   Gwen verchS,S,C,P,P | 
 | 
 | 
|   Howel ap of BershamS,S,C,P,P | 
born Bersham, (Denbighshire), Wales | 
 | 
|   Rhys apC | 
 | 
 | 
| IEUAN AP HOWEL | 
 | 
 | 
|   Gwenllian verchS,S | 
 | 
 | 
| IEUAN AP ROBERT | 
 | 
 | 
|   Meredydd ap of Keselgyfarch Gwedir, CarnarvonshireS,P,P | 
 | 
died 1525 | 
| IEUAN FYCHAN AP IEUAN | 
 | 
 | 
|   Margaret ferchS,S,C,P,P | 
 | 
 | 
| IEUAN LLOYD FYCHAN | 
 | 
 | 
|   Llywelyn ab of Pwll DyfachP | 
 | 
 | 
|   Lowri verchS,S,C,P | 
 | 
 | 
| IEUAN LLWYD | 
 | 
 | 
|   Marsli verchS | 
born Bodsilin, Abergwyngregyn, Wales | 
 | 
| IEUAN VYCHAN | 
 | 
 | 
|   David ab of LlanuwchllynC,P,P | 
 | 
 | 
| IEVAN | 
 | 
 | 
|   Grono ap of Hafod-y-WernS,C,P | 
born Hafod-y-Wern, (Bersham, Wrexham, Denbighshire), Wales | 
 | 
|   Gruffydd Ddû ap of Llanvendigaild, LlangelyninC,P,P | 
 | 
 | 
|   Ievan Lloyd Fychan apC,P,P | 
 | 
 | 
| IEVAN AP HOWELL | 
 | 
 | 
|   < > verch of HenllysS,S,P | 
 | 
 | 
| IEVAN AP OWEN | 
 | 
 | 
|   Gruffyd ap of AbergynolwynC,P | 
born Bef 1516, <Abergynolwyn, Tal-y-Llyn, Merionethshire (Gwynedd)>, Wales | 
died After 1550 | 
| IEVAN LLOYD FYCHAN | 
 | 
 | 
|   Llewelyn ap of Pwll Dyfach in PembrokeshireP | 
 | 
 | 
|   Llowry verch of Pwll Dyfach, PembrokeshireS,S,C,P | 
 | 
 | 
| IFOR | 
 | 
 | 
|   Philip ap Lord of Is CoedS,S,C,P,P | 
 | 
 | 
| INGELRICA | 
 | 
 | 
|   MaudS,C,P | 
born Abt 1032, <St. Martin's-Le-Grand, London, Middlesex, England> | 
 | 
| INGJALDSSON | 
 | 
 | 
|   Hraerek "Hnauggvanbaug"C,P | 
born Abt 533, <Hleithra, Denmark> | 
 | 
|   HrolfP,P | 
born Abt 700, <Dyflinni (Dublin), Ireland> | 
 | 
|   Olaf "the White" King of IrelandS,C,P,P | 
born Abt 840, <Dyflinni (Dublin), Ireland> | 
died 871, Dublin, Dublin, Ireland | 
|   Olaf "Wood Cutter"S,S,C,P,P | 
born Abt 682, <Vaermland, Sweden> | 
 | 
|   Olof "Hviti" King of IrelandS,C,P,P | 
born Abt 840, <Dyflinni (Dublin), Ireland> | 
died 871, Dublin, Dublin, Ireland | 
|   Olof "Trätälja" [Legendary]S,S,C,P,P | 
born Abt 682, <Vaermland, Sweden> | 
 | 
| INGVARSSON | 
 | 
 | 
|   Onund "Braut" King in SwedenC,P,P | 
born Sweden | 
 | 
| INSULA | 
 | 
 | 
|   Adeliza deS,S,C,P | 
born Abt 1058, <Wiltshire, England> | 
 | 
|   Humphrey deP,P | 
born Abt 1032, <Wiltshire, England> | 
 | 
| IORWERTH | 
 | 
 | 
|   Griffith ap of LlwynonC | 
 | 
 | 
|   Hwfa ap of Hafod-y-WernS,C,P | 
born Maelor, Gymraeg, Denbighshire, Wales | 
 | 
|   Iorwerth Vychan apC | 
 | 
 | 
|   Llywelyn apS,S,S,S,S,C,P,P,P,P,P,P,P,P,P | 
born Abt 1173, <Dolwyddelan, Conwy>, Wales | 
died 11 Apr 1240, Cistercian Abbey of Aberconwy, Wales | 
|   Lowarch Goch ap of DenbighshireC,P,P | 
born Abt 1139, <Rhos>, Denbighshire, Wales | 
 | 
|   Madog ap of PenllynS,S,C,P,P | 
 | 
 | 
| IORWERTH AB GWRGENEU | 
 | 
 | 
|   Cynddelw abC,P | 
 | 
 | 
| IORWERTH AP DAVID | 
 | 
 | 
|   Gwenllian verchS,S | 
 | 
 | 
| IORWERTH AP MADOG | 
 | 
 | 
|   Gruffydd apC | 
 | 
 | 
|   Gwenllian verchC | 
 | 
 | 
|   Iorwerth Vychan apC | 
 | 
 | 
|   Maude verchC | 
 | 
 | 
| IORWERTH GAM AP OWAIN | 
 | 
 | 
|   Iorwerth Vychan apS | 
 | 
 | 
| IORWERTH GOCH AP MADOC | 
 | 
 | 
|   Erdhglad verchS,S,P | 
 | 
 | 
| ITHEL GOCH AB MEREDYDD | 
 | 
 | 
|   Arddun verchS,C,P,P | 
 | 
 | 
| IVARSDATTER | 
 | 
 | 
|   AudS,S,S,C,P,P | 
born Abt 633, <Am, Denmark> | 
 | 
| IVARSSON | 
 | 
 | 
|   Eystein "Glumra" Jarl of OpplandS,S,C,P,P,P,P,P,P,S,S,C,P,P,P,P,P,P,S,S,C,P,P,P,P,P,P,S,S,C,P,P,P,P,P,P | 
born Abt 800, <Maer, (Nord-Trondelag), Norway> | 
 | 
|   HaakonS,S,C,P,P | 
born Abt 1031, <Norway> | 
 | 
| IVOR | 
 | 
 | 
|   Philip ap Lord of IscoedS,S,C,P,P | 
 | 
 |