He never married and on his death in 1722 the title and estates devolved by entail upon his youngest sister, Jean.
On her death the estates passed to her nephew Sir William Cunningham, 3rd Baronet, of Cunninghamhead.
Isabella was summoned as a Lady to the Coronation of King George II and recognised in the lordship of Ruthven of Freeland.
The lordship of Ruthven of Freeland, which could be passed on through female lines, was inherited by his eldest daughter, Bridget, the eleventh holder.
She married firstly George Josslyn L'Estrange Howard, 11th Earl of Carlisle, and secondly Sir Walter Monckton.
[3] Thus the first person in the list below which it recognizes as a peer is Walter Hore-Ruthven, who was created 1st Baron Ruthven of Gowrie in the Peerage of the United Kingdom.
The heir presumptive is the present Earl's younger brother, The Hon Philip Charles Wentworth Howard (b.