Ui Briuin and Uí Fiachrach
Eochaidh Mugmedon was king of Connacht at the end of the fourth century. In early historical times his offspring: separated into three dynasties --

• Brioin the Uí Briuin, ancestors to the Síl Murray (O Conors and MacDermots) and In the seventh century the Uí Briuin began separating into three branches --
  • Ui Briuin Seola (O Flahertys)
  • Ui Briuin Breffney (O Rourkes and O Reillys)
  • Ui Briuin Ai (O Conors, MacDermots and others)

 

• Fiachra the Uí Fiachra, ancestors to the O Dowds and O Heynes

• the Ui Fiachrach Muaide in County Sligo
• the Ui Fiachrach Aidne in south Galway

 

• Ailill the Uí Aillela, their name is perpetuated in the barony of Tir-Errill in County Sligo.

Regional references from the Annals (Regional Kings, i.e. rí or rex) 

• Index
• 4-Leaf Pages