Caffar O'Donnell

Caffar O'Donnell
Inscription above the tombs of Caffar and his brother Rory in San Pietro in Montorio, Rome
Bornc. 1583
Tyrconnell, Ulster, Ireland
Died15 September 1608 (aged 25)
Rome, Papal States
Spouse
(m. 1604)
Issue
FatherHugh McManus O'Donnell
MotherIníon Dubh

Caffar O'Donnell (Irish: Cathbharr Ó Domhnaill; Latinised Calfurnius; c. 1583 – 15 September 1608) was an Irish nobleman of the O'Donnell clan of Tyrconnell. The youngest brother of Hugh Roe O'Donnell, Caffar fought for the Irish confederacy in the Nine Years' War.

In 1605 he married Rosa O'Doherty, sister of Cahir O'Doherty. Caffar took part in the Flight of the Earls in September 1607, leaving Ireland for mainland Europe. He settled in Rome but shortly afterwards died of a fever, aged 25. He is buried in San Pietro in Montorio, beside his older brother Rory O'Donnell, 1st Earl of Tyrconnell.