IAGO ab IDWAL ap MEURIG (d.1039), king of Gwynedd ;
IAGO ab IDWAL FOEL ( fl. 942-979 ).
IDWAL ap MEURIG (d.996),
IDWAL FOEL (‘ the Bald ’ ; d.942), king of Gwynedd ;
IESTYN ap GWRGANT ( fl. c. 1081-1093 ), last independent ruler of Glamorgan .
IEUAF (or IDWAL) ab IDWAL FOEL (d.985), joint king of Gwynedd .
IEUAN (IFAN) ap SION ( fl. c. 1612-1636 ), poet .
IEUAN (IFAN) DYLYNIWR ( fl. 1520-1567), harpist and bard .
IEUAN (IFAN) o GARNO (Syr) ( fl. c. 1530-1570 ), poet and cleric , ofCarno, Mont.
IEUAN ap BEDO GWYN, or IEUAN BEDO GWYN ( fl. c. 1530-1590? ), poet
IEUAN ap GRUFFUDD LEIAF ( fl. latter half of 15th cent.), poet ;
IEUAN ap HUW CAE LLWYD ( fl. 1475-1500), one of the minor poets of the 15th cent. ;
IEUAN ap HYWEL SWRDWAL ( fl. 1430-1480), poet ,
IEUAN ap IEUAN ap MADOG ( fl. 1547-1587), scribe .
IEUAN ap LLYWELYN FYCHAN (d.1532), poet ;
IEUAN ap MADOG ap DAFYDD ( fl. c. 1500 ), poet ;
IEUAN ap RHYDDERCH ap IEUAN LLWYD ( fl. 1430-1470), gentleman and poet , of Cardiganshire,
IEUAN ap RHYS ap LLYWELYN ( fl. beginning of 16th cent.), a poet concerning whom no details remain.
IEUAN ap TUDUR PENLLYN ( fl. c. 1480 ), poet ,
IEUAN BRECHFA [ c. 1430 -1500], poet and genealogist ;
IEUAN BRYDYDD HIR HYNAF ( fl. c. 1450 ), poet ;
IEUAN CLYWEDOG ( fl. 1577-1596), poet ;
IEUAN DEULWYN ( fl. c. 1460 ), poet ,
IEUAN DRWCH Y DARAN ( fl. c. 1370-1400? ), poet .
IEUAN DU'R BILWG ( fl. c. 1470 ), poet .
IEUAN DYFI (1461? -1500 ) .
IEUAN FYCHAN ap IEUAN ab ADDA (d. c. 1458 ), poet ,
IEUAN GETHIN ap IEUAN ap LLEISION ( fl. c. 1450 ), poet and gentleman , ofBaglan, Glam. .
IEUAN GYFANNEDD ( DWB , 412).
IEUAN LLAFAR ( fl. c. 1594-1610 ), poet ,
IEUAN LLWYD ab Y GARGAM (14th cent.), a poet ,
IEUAN LLWYD BRYDYDD ( fl. c. 1460-1490 ), a poet ,
IEUAN LLWYD SIEFFRAI (1575 -1639
IEUAN MON (or IEUAN MON HEN ) ( fl. c. 1460-1480 ), poet ,
IEUAN RHAEADR ( fl. c. 1480), poet ,
IEUAN RUDD ( fl. 1470), a Glamorgan bard
IEUAN TUDUR OWEN ( fl. c. 1627 ), a poet
ILLTUD ( c. 475 - c. 525 ) a Celtic saint and one of the founders of monachism in Britain .
INCO BRYDYDD ( fl. c. 1480 ), poet .
INGRAM, JAMES (d.1788),Methodist exhorter, and afterwards Independent minister ;
INNES, JAMES DICKSON (1887 -1914), artist ;
INNES, JOHN (1853? -1923), accountant and antiquary ;
IOCYN DDU ab ITHEL GRACH ( fl. c. 1380 ), poet .
IOLO GOCH ( c. 1320 - c. 1398 ), poet ,
IORWERTH (or GERVASE ), abbot of Talley and bishop of S. Davids ,(1215-1229 ).
IORWERTH ab Y CYRIOG ( fl. c. 1380 ), poet ,
IORWERTH ap BLEDDYN (d.1111 ) ,
IORWERTH ap MADOG ( fl. 1240?-1268?), jurist ,
IORWERTH BELI , a poet who sang in Gwynedd early in the 14th cent.
IORWERTH DRWYNDWN ( The Flat-nosed ) (d. probably c. 1174 ),
IORWERTH FYCHAN ap IORWERTH ap ROTPERT ( fl. c. 1300 ), poet ;
IORWERTH FYNGLWYD ( fl. c. 1480-1527 ), bard ,
IRBY, GEORGE FLORANCE, 6th Baron BOSTON (1860 -1941), landowner and scientist ;
ISAAC, DAVID LLOYD (1818 -1876), cleric and author ;
ISAAC, EVAN ( DWB , 418).
ISFAEL ( ISHMAEL ) ( fl. 6th cent.), saint .
ITHEL ap RHOTPERT or ROBERT ( fl. 1357-1382), archdeacon .
ITHEL DDU ( fl. second half of 14th cent. )