Background
Williamson was born in Bombie, near Kirkcudbright, Kirkcudbrightshire, Scotland.
Williamson was born in Bombie, near Kirkcudbright, Kirkcudbrightshire, Scotland.
Williamson commenced employment with the Bank of Scotland around 1850. Williamson joined the Union Bank in 1852, becoming manager of the Ballarat branch and later an inspector. He retired and went to England 1878, returning to Victoria in 1882.
He had mining and pastoral interests.
Williamson was one of the owners of the Mount Egerton mine. In December 1882, Williamson was sworn-in as member for Nelson Province in the Victorian Legislative Council.
He held the seat until August 1888. Williamson died at his residence "Helenslea", in Brighton, Victoria, on 19 September 1914.