+---James Trethewy +---Richard Trethewy (ABT 1665-JAN 1741) +---John Trethewey (ABT 1690-) | +---Ann Martyn (ABT 1666-JUN 1738) +---Joseph Trethewy (ABT 1735-DEC 1816) | | +---Phillip Mellow (ABT 1660-JAN 1711) | +---Temperance Mellow (ABT 1690-MAY 1765) | +---Jane ? +---Jonas Trethewey (ABT 1769-) | | +---John Rickard | | +---Jonas Rickard (ABT 1705-) | +---Caroline Rickard (ABT 1734-) | +---Honour ? +---William Trethewey (ABT 1802-) | +---Grace Trenouth (-1808) +---Thomas (Tommy) Trethewey (ABT 1828-) | | +---James Trethewy | | +---Richard Trethewy (ABT 1665-JAN 1741) | | +---John Trethewey (ABT 1690-) | | | +---Ann Martyn (ABT 1666-JUN 1738) | | +---Joseph Trethewy (ABT 1735-DEC 1816) | | | | +---Phillip Mellow (ABT 1660-JAN 1711) | | | +---Temperance Mellow (ABT 1690-MAY 1765) | | | +---Jane ? | | +---Thomas Trethewy (ABT 1767-JUN 1827) | | | | +---John Rickard | | | | +---Jonas Rickard (ABT 1705-) | | | +---Caroline Rickard (ABT 1734-) | | | +---Honour ? | +---Elizabeth (Betsy) Trethewy (ABT 1806-) | | +---Sampson Curra | +---Ann Curra (ABT 1769-) | +---Ann ? +---Richard Docton Trethewey (25 AUG 1874-) | +---Sarah Ann Parsons (ABT 1833-) +---William Thomas Trethewey (15 OCT 1899-27 JUL 1981) | | +---Jonathon Littleton (ABT 1835-) | +---Gertrude Littleton (24 APR 1871-) | +---Gertrude ? (ABT 1837-) Sylvia Eileen Trethewey (18 MAR 1927-) +---Florence Emily Powell (02 JUN 1897-15 JUN 1935)