Before 1638 Sir Valentine married Mary MacCarthy, the second daughter of
Sir Charles (alias Cormac) MacCarthy, 1st Viscount Muskerry and his first wife Margaret O'Brien. She was a sister of his stepmother, his father's second wife. Valentine and Mary had four children, two sons: • Valentine (1638–1694), 1st Viscount Kenmare • John of Ardagh (died 1706), married in 1672 Joan, daughter of Edmund Butler and sister of
Pierce Butler, 6th Baron Cahir, but died childless. —and two daughters: • Ellis, married John Tobin of Cumpshinagh, County Tipperary. • Eleanor, married a Mr. Power of Kilmeadon, County Waterford. == Death and timeline ==