 Their son the fourth Baronet assumed the additional surname of Buchanan in 1877.Neither the presumed seventh Baronet nor eighth Baronet successfully proved their succession and were not on the Official Roll of the Baronetage.Following the death of the 8th Baronet in a motor vehicle accident in 2018, the title passed to his son, the 9th Baronet; he also has not proven his claim to the title.