This branch of the family had been forbidden to bear their own surname by King James VI, the only instance of this in British history.
The ban was revoked in 1661 by King Charles II but restored during the reign of William and Mary.
The second Baronet was a colonial administrator and served as Governor of Dominica, Antigua, Barbados and Trinidad.
Sir Evan MacGregor, third son of the second Baronet, was Permanent Secretary to the Admiralty.
The heir presumptive is his only brother, Ninian Hubert Alexander MacGregor (b.