Jean Sandercock 
| +---Thomas Martyn (BEF 1674-)
| +---Philip Martyn (1702-)
| | +---Mary Congdon
| +---Robert Martyn (1733-)
| | +---Elizabeth ?
| +---Philip Martyn (1766-)
| | +---Elizabeth Webb
| +---Robert Martyn (1798-)
| | +---Mary Ann Warwick
| +---John Martyn (19 FEB 1826-30 MAR 1893)
| | +---Elizabeth Nicholls (1791-)
| +---Joseph Martyn (ABT 1858-)
| | +---Fanny Grigg (ABT 1827-)
+---Polly Martyn (1891-)
+---Ellen Martin (ABT 1860-)