Thomas Dunckerley (23 October 1724 – 19 November 1795) was a prominent freemason, being appointed Provincial Grand Master of several provinces, promoting Royal Arch masonry, introducing Mark Masonry to England, and instituting a national body for Templar masonry. This was made possible by an annuity of £100, rising to £800, which he obtained from King George III by claiming to be his father's illegitimate half brother.