 In 1616 the Earl married Isabel Cope, daughter, only child and sole heiress of Sir Walter Cope (c. 1553–1614) of Cope Castle in the parish of Kensington, Middlesex, by his wife Dorothy Grenville (1563–1638).Having inherited Cope Castle by marriage, Rich changed its name to Holland House, having been raised to the peerage as Baron Kensington in 1622, and Earl of Holland in 1624.By his wife he had at least six children, including