About Sir William Maxwell of Calderwood, Baronet
"Sir William Maxwell, Baronet [S 1627] of Calderwood, only surviving son and heir; born 7 January 1748; succeeded to the Baronetcy 2 June 1789. He married, 5 May 1807, Hannah Leonora, youngest daughter of Robert Pasley of Mount Annan, co Dumfries. He died s.p. 12 August 1829."
SOURCE: Complete baronetage; Cokayne, George E. (George Edward); 1900; Vol. II; page 321