+---Robert James Siebert (16 MAY 1874-20 APR 1953)
| +---Mary Ritchie 
Robert Darcy Siebert (13 NOV 1899-)
| +---Henry Treanor (-20 SEP 1907)
+---Isabella Treanor (ABT 1872-16 JUL 1959)
+---Elizabeth Jane Thompson (-20 AUG 1878)
+---Margaret Rowan