Main Blackett Tree

Interactive tree of John Collinson

William Collinson Summerson 1934–2015
Valerie A. Turnbull –
Charles Atkinson Summerson 1939–2010
Sybil T. Summerson –
John B. Watson –
Olive May Collinson 1904–1981
Harry Summerson 1902–1969
John Collinson 1875–1924
Elizabeth Hannah Alderson 1876–1946