St. Samson was a generation younger than Illtud and was ordained by him at the abbey of Llanwit Major (Llanilltud Fawr).
There is an inscribed stone at the church there which states it was prepared for the souls of Samson the abbot and others, one of which is a king called Iuthahelo, that is Ithel (Barturm incorrectly thought the stone bore the name Iltutus). This is likely to be Ithel Hael of Llydaw, thus indicating Llydaw was not only the name for Brittany but also of a region of Glamorgan.
Illtud’s father was Bicanus, prince of Llydaw. He may have preceded Erb, king of Gwent and Ergyng, and been conflated with Erbic, a later king. This would suggest Bicanus was of gen. -2 and Illtud of gen. -1. His mother was Rieingulid, daughter of Anblawd, wrongly identified as Amlawdd Wledig.
V. Samsonis states that Illtud was a disciple of St. Germanus but chronology indicates this could not have been the bishop of Auxerre. The V. Ninnochae states:
“Sanctus Germanus episcopus ex Hibernensium regione transmissus a Sancto Patricio archiepiscopo, venit ad Brochanum regem Britanniæ.”
This individual, who was alive during the reign of Brychan of gen. -1, is likely to have been the Germanus who ordained Illtud. He was St. Garmon who, as indicated by Bartrum, was the Germanus of the Historia Brittonum. HB 39 suggests he was probably of the same generation as Vortigern’s daughter, that is gen -2.