 Mrs Meredith's mother, Elizabeth Hagerman Macaulay (1826–1899), was a daughter of George Macaulay (1796-1828) of Bath, Upper Canada, and a niece of John Simcoe Macaulay, Sir James Buchanan Macaulay, Christopher Alexander Hagerman and John Solomon Cartwright.Mrs Meredith was the widow of Francis Wolferstan Thomas, by whom she had three children.From 1903, he lived at a house designed for him by Robert Findlay on Pine Avenue in Montreal's Golden Square Mile.