William Henry Whiteley III (June 5, 1834 – August 18, 1903) was a businessman, politician, and sea captain.
He was the oldest child of the family and had four younger siblings Joseph ([1838), Louisa Mary (1840), and the twins Alfred James and Charles (1842).
As a child he apprenticed as a printer for the American Traveller, his duty being to run to the ships that docked in the harbour and receive the latest news from Europe.
In 1844, his father, William II, was murdered crossing the Cambridge Bridge across the Charles River while returning from work.
William's mother, Marie, soom remarried to a fishing merchant, James Buckle (1813–1894).
He also enjoyed a successful career in politics by representing the district of Harbour Grace in the Newfoundland House of Assembly from 1889 to 1893.