Kilkee Castle is no more and was probably built by the MacSweeney family ,mercenary soldiers from Scotland, in the 15th Century. (IM) Colle mac swyne(MacSweeney) chief captain of the gallowglass of the county Clare was in possession of Kilkee Castle in 1570 (SPI) ..Owner in fee of the castle, town and lands of Kilkee, left to his son Hugh when he died in 1576 ..(LW).We know the castle was a ruin in the 1600s.
Daniel Mac Donnell : fourth son of Sir James; deprived of his patrimony in Dunluce, Antrim, settled at Kilkee, county of Clare, where he obtained leases of several lands from his kinsman Lord Clare.Married into the O’Brien Family : died about 1675(NLI). .Captain James MacDonnell . of Kilkee, was the second son of Daniel MacDonnell and Penelope, daughter of Teige O’Brien of Dough. He fought on behalf of James the 2nd in the Clare Dragoons . It would seem that at some point the McDonnell’s built Kilkee House on the site of the ruined castle.Charles McDonnell son of James was lord High Sheriff of Clare in 1760. His grandmother Isabel was the last occupant in 1788 after he moved to New Hall House in Ennis. After Isabel died the house then fell into ruin with the stones used to build new houses, There are some Gate posts on Clifton Terrace which come from there.