The Nicolson Baronetcy, of that Ilk and of Lasswade, in the County of Midlothian, was created in the Baronetage of Nova Scotia on 27 July 1629 for John Nicolson, with remainder to his heirs male whatsoever.
Arthur Nicolson, de jure eighth Baronet, was the great-grandson of James Nicolson, Bishop of Dunkeld, brother of the first Baronet.
In 1984 David Nicolson, 4th Baron Carnock, was recognised in the title and became the thirteenth Baronet.
The Nicolson Baronetcy, of Carnock, in the County of Stirling, was created in the Baronetage of Nova Scotia on 16 January 1637.
The heir apparent is the present holder's son Hon.