+--Alfred Clem 
+--Harry Beaumont Clem  (12 Sep 1880-2 Apr 1969)
|  +--Rachel Beals 
Winnifred Muriel Clem  (6 Mar 1912-24 Jun 1965)
|  +--John Zwicker 
+--Jeune Rose Stella Zwicker  (13 Jul 1880-29 Oct 1959)
   +--Emma Croft