Found a bit more:
Robert MacMURRAY . Lambeg/Drumbeg died 10 Oct 1874 aged 60; husband of Elizabeth who d. 16 Mar 1902 aged 89; father of Agnes, Elizabeth, Sarah, Robert John & Maria (Hull); buried Hillhall Presbyterian graveyard.
*(Did Maria marry a Hull??)
Maybe this is him too?
Robert McMURRAY Esq. Lambeg of Lisnatruck; a gentleman; husband of Eliza Boyd; mentioned in Deeds dated 1857 Registry of Deeds, Dublin Vol 185811 p144.
Robert McMurray married to Eliza Boyd.