Are both Norman Rush and J. P. Donleavy of Irish heritage?
J. P. Donleavy James Patrick Donleavy (23 April 1926 – 11 September 2017) was an Irish-American novelist and playwright. His best-known work is the novel "The Ginger Man", which was initially banned for obscenity.
Derbforgaill Dearbhfhorghaill (older spelling: Derbforgaill) (1108–1193), anglicized as Derval, was a daughter of Murchad Ua Maeleachlainn, king of Meath, and of his wife Mor (died 1137), daughter of Muirchertach Ua Briain. She is famously known as the "Helen of Ireland" as her abduction from her husband Tigernán Ua Ruairc by Diarmait Mac Murchada, king of Leinster, in 1152 played some part in bringing the Anglo-Normans to Irish shores, although this is a role that has often been greatly exaggerated and often misinterpreted.