Their son Christopher French assumed the surname of St George in lieu of his patronymic.

He assumed the surname of Coke (pronounced "Cook") in lieu of his patronymic in 1750.

His son, the second Marquess, assumed the surname of Taylour in lieu of Taylor.

Lord Rothes assumed the surname of Leslie in lieu of Evelyn.

After a Royal Grant he assumed the name and arms of Scrope, in lieu of Thomson.

The third Baronet assumed the surname of Campbell in lieu of Livingston.

He also assumed the forename of Hugh in lieu of Herbert, but later changed it to Sammy Parks.

In 1804 he assumed the surname of Preston in lieu of his patronymic.

He assumed the surname of Boyd in lieu of Hay the same year he succeeded to the title.

In 1803 Thomas assumed the surname of Weddell in lieu of his patronymic.