 Baillie had already been created a baronet, of Portman Square in the County of London, on 11 December 1812, with normal remainder to the heirs male of his body.The 1812 creation became extinct on his death in 1820 while the 1819 creation was passed on according to the special remainder to his nephew Alexander Mackenzie, the second Baronet.He was the son of Roderick Mackenzie and his wife, the half-sister of the first Baronet.