(1880-)
| +---Richard Thomas 
(ABT 1781-)
| +---William Thomas (ABT 1809-ABT 1876)
| | | +---Thomas Hoskin (ABT 1671-)
| | | +---Thomas Hosking (ABT 1716-)
| | | | | +---Philip Trewartha (-ABT 1624)
| | | | | +---John Trewartha (ABT 1598-1687)
| | | | | | | +---Henry Cock (ABT 1537-ABT 1616)
| | | | | | +---Agnes Cock (ABT 1564-)
| | | | | | | +---Lawrence Rondall alias Tolsethen
| | | | | | +---Margery Rondall (-ABT 1623)
| | | | | +---Philip Andrewartha (ABT 1642-MAY 1705)
| | | | | | | +---John Carthew
| | | | | | +---Mary Carthew (ABT 1609-MAR 1671)
| | | | | | | +---Robert Jenken (-ABT 1569)
| | | | | | | +---Richard Roberts alias Trevernan alias Jenken (-ABT 1624)
| | | | | | | | +---Jennet ? (-ABT 1588)
| | | | | | +---Eleanor Roberts (ABT 1567-ABT 1655)
| | | | | | | +---John Tremeryn
| | | | | | +---Johan or Jane Tremeryn (-ABT 1603)
| | | | | | +---Jennet ? (-ABT 1588)
| | | | +---Margarett Andrewartha (ABT 1689-)
| | | | | +---Henry Cock (ABT 1537-ABT 1616)
| | | | | +---William Cock alias Connerwartha (ABT 1572-1645)
| | | | | | | +---Lawrence Rondall alias Tolsethen
| | | | | | +---Margery Rondall (-ABT 1623)
| | | | | +---Henry Cock (ABT 1604-ABT 1659)
| | | | | | | +---James Edwards
| | | | | | +---Alice Edwards (-ABT 1614)
| | | | +---Mary Cock (ABT 1656-MAY 1720)
| | | | | +---Edwards Williams
| | | | +---Cheston Williams (-ABT 1665)
| | | | +---Agnes Jenkin
| | | +---Thomas Hosking (ABT 1748-ABT 1825)
| | | | +---Phillis Semmons (ABT 1715-ABT 1788)
| | +---Thomasine Hoskin (ABT 1781-ABT 1826)
| | +---Margaret Bryan (ABT 1750-ABT 1823)
| +---George Thomas (ABT 1833-29 JUL 1902)
| | +---Eliza Green Dodge (ABT 1812-ABT 1879)
+---Matilda Thomas (11 JUL 1863-)
+---Ann Williams (ABT 1836-09 JAN 1901)