Cormac MacDermot was a 13th-century Irish ruler who was King of

Moylurg {{Use dmy dates, date=April 2022 Magh Luirg or Magh Luirg an Dagda, Anglicised as Moylurg, was the name of a medieval Irish kingdom located in modern-day County Roscommon, Ireland. It was a sub-kingdom of the kingdom of Connacht from c. 956–1585 ...

, reigning 1218–44. A great-great-great grandson of Cormac, Dermot Ruadh MacDermot, was ancestor of the

MacDermot Roe MacDermot Roe (MacDiarmata Ruadh) is the name of a sept of the MacDermot Kings of Moylurg. Tracing their origin to 1266, the MacDermots Roe (MacDiarmata Ruadh) of Ireland served as Biatachs General of the Kingdom of Connacht and were the princ ...

sept of the family.

References

* "Mac Dermot of Moylurg: The Story of a Connacht Family", Dermot Mac Dermot, 1996. * Connachta Year of birth missing Year of death missing 13th-century Irish monarchs Kings of Connacht MacDermot family {{Ireland-royal-stub