+———James GERVIN (1811/2 County Tyrone, Ireland – 27 Nov 1875 Ottawa, Ontario, Canada)      |  +———Joseph GERVIN (abt 1862 Ottawa, Ontario, Canada – 1953)  |   |          |   |   +———William WHITEHEAD (abt 1797 Kent, England – 8 Aug 1844 Ottawa, Ontario, Canada)  |   |   |  |   +———Elizabeth WHITEHEAD (17 Mar 1824 St. Marylebone, Middlesex, England – 15 Mar 1911 Ottawa, Ontario, Canada)  |       |      |       +———Mary Jane PARKER (abt 1805 Waterford, Ireland – 6 Jun 1888 Ottawa, Ontario, Canada)  |      Dorothy Lillian GERVIN (31 Jan 1898 Gloucester, Ontario, Canada – )  |      +———Elizabeth SMITH (1868 Buckingham, Quebec, Canada – 1946)