- YFFIson of Osfrid, and grandson of Edwin, king of Northumbria. He was baptized by Paulinus at York, on Easter day A.D. 627 (
- YNYR GWENTregulus of South Wales about the close of the 5th century. He married Madryn, daughter of Vortimer, by whom he became he
- YRIEIX(Yrrer, Arepius, ARIDIUs, Arius), abbat of the monastery of St. Yreix, near Limoges. The Vita S. Aridti abbatis, attribu