Givins place of birth is unknown, but it has been suggested he was born in
Ireland. He may have been related to
Henry Hamilton, as
John Graves Simcoe referred to him as having been "bred up" by Hamilton. Givins came to
Fort Detroit when Hamilton was posted there in 1775. Part of a British unit that seized
Fort Vincennes, Indiana, in 1778, Givins was captured by
American forces when they retook the post in 1779 and spent two years as a
prisoner of war. Givins was released in 1781. No record exists of his activities until he was appointed a
lieutenant with the
Queen's Rangers on 30 November 1791. Knowledgeable in
Ojibwe, he served as a courier and interpreter for Lieutenant Governor Simcoe in Simcoe's dealings with the province's Indians. In June 1797 he was appointed the post of Indian Agent for the town of
York by
Peter Russell. Among Givins's duties were various official interactions with Indian bands, such as the distribution of annual gifts due from land surrenders. He was also charged with the task of keeping the
Six Nations of Upper Canada under
Joseph Brant's leadership from forming a viable alliance with the
Mississaugas of Upper Canada. In 1802 Givins built a large estate west of Toronto on land he received as a loyalist fighter in the American Revolution. He dubbed the estate
Pine Grove. The Queen's Rangers were disbanded in 1803, and Givins was made a captain of the 5th foot regiment on 19 November 1803. ==War of 1812==