The Sims family were early white settlers of what is now Hawkesville, Ontario. Members of the family are the descendants of Reverend James Sims was born ca.1812 in Insch, Aberdeenshire, Scotland. On June 1, 1836, he married the widow Janet Harvey Robertson and in 1837 came to what is now Canada with a large party of relatives: his father and mother, his wife and step-children Alexander, John and Jane Robertson, his brothers Peter and Andrew Sims, his sister Margaret, and nephews James and Peter Sims.

In 1838 the family settled as squatters on Queen's Bush land near Hawkesville in Wellesley Township. James and Margaret Sims had four children: Janet Sims, (1838-1926), James Campbell Sims (1842-1929), Peter Harvey Sims (1844-1920) and William Andrew Sims (1846-1930). James Sims died October 31, 1880. Both he and his descendants played an active role in the the educational, religious and commercial development of what is now the Region of Waterloo.

The Dominion Life Assurance Company was established in 1889. In 1912 Dominion Life moved to their new head office at 14 Erb Street west, a building formerly owned by the Ontario Mutual Life Assurance Company. In 1956 the Lincoln National Life Insurance Company of Fort Wayne acquired controlling shares, but continued to operate the company under its incorporated name. The company was bought by Manulife in 1985.