Standish Hayes O'Grady was an Irish antiquarian. He was born at Erinagh House, Castleconnell, County Limerick, the son of Admiral Hayes O'Grady. He was a cousin of the writer Standish James O'Grady, with whom he is sometimes confused. As a child, he learnt Irish from the native speakers of his locality. He was educated at Rugby School and Trinity College Dublin.
