Only the O'Donovan chiefs of territories south of Kilmallock were inaugurated by the MacCaarthy Reagh; the O'Donovan chiefs of Bruree and territories north of Kilmallock were inaugurated by their Fidgheinte kinsmen. The O'Donovans in Carbery may have been joined by a junior sept of their Ó Coileáin kinsmen from Uí Chonaill Gabra. A large number of O'Donovans of Carbery and Cork may also descend from the Dunavans of the Corca Laidghe, which was a completely different, and perceived as inferior (less royal) race than the descendants of Eoghan Mor. Later, the title Prince of Carbery (Cairbre) would be adopted by the MacCarthy Reaghs, although there is significant doubt as to whether this is actually derived from the former tribal name of the O'Donovans (Ui Chairpre of the Ui Fidgente), and if so, then what circumstances led to it being extended well beyond the territories belonging to the O'Donovans. In any case, the Carberry septs of the Donovans were junior to the MacCarthy Reaghs, from whom they received the White Wand. The leading family of the Carbery O'Donovans, Clann Cathail, paid to their overlords a surprisingly small, economically insignificant rent, but the precise reason for this is lost to history. Possibly earlier times were recalled, or it may be due to the special relationship they developed with Fíngin Reanna Róin Mac Carthaig (see below). From their association with Ivar of Limerick, the O'Donovans are related to the Norse Uí Ímair, through a daughter of the Limerick king married to the family's eponymous founder, Donnubán mac Cathail, Lord of Uí Fidgenti. The influence of the Danes on the O'Donovans was significant, as they carried Danish names for the next three centuries. Donndubhán was a major figure and opponent of Mathgamain mac Cennétig and his brother Brian Bóruma in the "Cogad Gáedel re Gallaib". He was in part responsible for the death of Mathgamain, and may have been slain by Brian for it, together with his brother-in-law Harald Ivarsson (Aralt mac Ímair), newly elected King of the Foreigners of Munster, by Brian in or around the year 978 in the Battle of Cathair Cuan.