It is known that John's wife's first name was Mary, but there is uncertainty regarding her last name. It is a possibility that it was Looby because, buried in the same plot as Nicholas Treacy (c.1805-1848), whom we think was a brother of Mary's husband John, is a John Treacy (c.1787-1848), husband of 'Mary Treacy alias Looby'.
Given that rural people in 19th century Ireland tended to marry locals, it is likely that Mary Looby came from the parish of Soloheadbeg, and it is a possibility that she was from the townland of Newtown because the only Loobys listed in Griffith's Valuation (1850s) for the parish of Soloheadbeg occupied land in Newtown.
Among the sponsors at the baptisms of the children of John Treacy and Mary Looby were Eliza and John Looby, indicating they may have been siblings of Mary.
The children listed below marked 'Caution: not verified' are the children of John Treacy and Mary Looby, who may well NOT be the children of OUR John Treacy.
Looby (also spelled Luby) is a common surname in the Tipperary/Waterford/Limerick area. It is derived from the Irish name Ó Lúbaigh which comes from the word 'lúbach' meaning 'cunning'.