Barnaby Fitzpatrick (born ) (c.1478–1575) was the last person to have claim to the kingship of Osraige; forfeiting his ancestral title in favour of being created the first Lord Baron Upper Ossory by King Henry VIII of England, by patent dated 11 June 1541, as part of the King's policy of Surrender and regrant. Barnaby Fitzpatrick was subsequently knighted on 1 July 1543.

Biography

Brían, finding his brother Diarmaid an embarrassment and a hindrance to his ambitions of becoming an English Baron, gave up his brother to the Butlers and the Butlers acted out their cruel revenge on him. That being done, Brían, in 1537, submitted to the English king and gave up all his ancient rights. So in 1541, Brían became Barnaby Fitzpatrick, the First Baron of Upper Ossory at Castletown. He was afterwards imprisoned at Waterford until he restored "some preys he had seized in Leix".

Family

First, about 1491 he married an unknown daughter of Ó Mórdha, who was his first cousin; she died, probably in childbirth. Second, about 1492 he married an unknown first cousin, who was also the first cousin of his first wife. Without dispensation from the church this second marriage was declared null. Third, about 1493 he married Catherine Ó Mórdha, who was his half-sister and also the half-sister of his first wife. They had children, which resulted in an uproar among the relatives of the second wife. Nevertheless the Pope absolved the pair, permitted their marriage, and decreed their present and future children were legitimate. According to Carrigan Brian’s children before his marriage to Margaret Butler probably included: Fourth, about 1532, he married Margaret Butler, widow of Richard Mór Burke and widow of Thomas FitzGerald (of Desmond), first daughter of Piers Butler, 8th Earl of Ormond. They had children: Fifth, about 1551 he married Elizabeth O’Connor. They had children:. According to Carrigan Brian also fathered: According to O’Hart Brian also fathered: In 2002, researchers Ronan Fitzpatrick and Steve Zalewski published a book containing a list of all known descendants of Barnaby Fitz-Patrick, 1st Baron Upper Ossory; revised edition published in 2013. – it is considered the list of descendants is incomplete.