The most important text regarding the family of Finn (son of Cumaill) is Fotha Catha Chnucha ("The Cause of the Battle of Cnucha"), as it is contained in the ancient parchment Lebor na hUidre (LU), dated to the 12th century.
[17] Cumhall is reputed to be buried within the grounds of Castleknock College, supposedly under a hill upon which an old water tower now stands.
Attempts to connect Cumhall with Camulus, a Celtic god of war known from Roman-era inscriptions, are now largely rejected.
Old Irish cumal means "female slave", and it is possible that a noble father was invented for Fionn to obscure an ignoble origin.
Alternatively, some early texts call the hero "Fionn mac Umaill", which may indicate his father's name was originally Umall.