William Blackadder (2 April 1915 – 16 September 1990) was a Scotland international rugby union player.
[7] Blackadder started for the Scotland Probables side for the second and final trial match of that season, on 15 January 1938.
He switched to play for the Scotland Possibles in the second half.
[5] While he was playing for Newcastle Northern he represented Northumberland county.
This Scottish rugby union biography article is a stub.