Hello Ciaran,
James Cotter the Younger (Séamus Óg Mac Coitir) was the son of Sir James Fitz Edmond Cotter and his second wife Ellen Plunkett daughter of Matthew, 7th Lord Louth. You can read about them (the Cotter Baronets of Rockforest, Co. Cork) at http://en.wikipedia.org/wiki/Cotter_family

Cheers,
Dafydd Cotter