Colreavy aka Gray

Hello, I am looking for any information on the Colreavy family; especially, Cormack Colreavy. His wife's name was Nabby. The only children I have found are James (1836), Bridget (1838) and James(1851). James wed Elizabeth McGowan. As for the Bridget and James I have no other information. Not even sure if Cormack and Nabby had other children. I think I found Nabby's death date 17 July 1885. It states that she died of old age( 84). She was a widow by then, so I think she was buried with her husband. Maybe that is how I can get information on Cormack. Any help on any members of the family would be very helpful. As for the aka Gray, I found that this surname was interchanged at times. I think more so with James and Elizabeth's children. Thank you