Thanks, Tom.
According to a search on the Irish Placenames Commission's web-site, the name is English and the Irish name has yet to be confirmed. However, I will check the source you recommend - does anyone else have access to this or offer a look-up ?
My great great great grandfather Thomas Killin was born in the parish of Mullingar near the market town of Mullingar around 1787. I have been through the RC birth records for Mullingar parish and the only likely entry that I found was a Thomas Killeen born to Hugh Killeen and Mary Stuart in 1785. I found many records of Killins/Killens/Killeens/Killians and Killions in the RC parish BMD index at Westmeath County Library going back to around 1740, as well as reference to a John Killinge having two houses and three garden plots, including the "black bakehouse" in the Civil Survey of Mullingar as at 23rd October 1641. I am trying to ascertain whether Killintown may have been the place of origin of the Killin family of Mullingar, Westmeath, like Ballykilleen was the seat of the Killeen or O'Killeen family in Mayo. I also found references to leases of land to one William O'Killin at Creevebeg in Ballyloughloe, Westmeath, in 1503. Any suggestions or advice would be much appreciated.
Kind regards
skill