That's very odd, Clive, because Daniel Looney [widower] married Jane Corkill / Crellin [widow] in 1840, so who was wife? Margaret in that 1841 census entry?
Her son Philip aged 10 was living with his Corkill grandparents at Ballagorry at the time of the 1841 census.
Perhaps the "Margaret" was one of Daniel's earlier two wives, and an error by whoever was taking the census. [I haven't been following Looney, apart from the marriage to Jane.]
Sue