Hugh Dean Thomas Williamson C.B.E. (1901-1985) was an Australian banking executive and philanthropist. Williamson was born 4 February 1901 in Ballarat and died 20 December 1985 in Melbourne. He was the son of John Christopher Williamson and Jane (née Thomas) Williamson. In 1929 he married Louise Buchanan McPherson. Near the time of his retirement they began living apart. He met Elaine Berkefeld, who became his companion for the remainder of his life.