+---John Wardlow Stevens
| +---Marianne Campbell 
George Frederick Stevens
| +---James Riddell (14 NOV 1804-15 FEB 1892)
| +---Walter Riddle (ABT AUG 1835-30 MAY 1914)
| | | +---Andrew Goodall (-BEF 1869)
| | +---Jane Goodall (ABT 1805-09 AUG 1869)
| | +---Janet Donaldson
+---Jane Riddle (08 NOV 1860-)
| +---William Chrichton
+---Janet Chrichton (ABT 1840-16 DEC 1875)