Rush
Rush—This name is found frequently in Co. Armagh, especially in the Fews, and is the anglicised form of O'Ruis, also found in Meath, Dublin and Wicklow. On the other hand it is the anglicised form of Loughry (O'Luachra) in Connacht, and of O'Foody (O'Fuada) in South and South-West Ulster
Alphabetical Index of Anglicised Surnames in Ireland
See also Woulfe’s Irish Names and Surnames
… and O'Hart's Irish Pedigrees