Complex sentence: James Talbot married Helen Calvert, daughter of George Calvert, 1st Baron Baltimore, in 1635, and had a son, Colonel George Talbot, who owned an estate in Cecil County, Maryland, which he named Ballyconnell in honour of his native town in Cavan.
Split into simpler sentences: James Talbot married Helen Calvert, daughter of George Calvert, 1st Baron Baltimore in 1635. James and Helen had a son, Colonel George Talbot, who owned an estate in Cecil County, Maryland, which he named Ballyconnell in honor of his native town in Cavan.