(26 JAN 1874-19 DEC 1956)
+---Arthur Lindsay Pearce (21 JAN 1918-)
| | +---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)
| | +---John Andrewartha (ABT 1645-ABT 1720)
| | | | +---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)
| | +---John Andrewartha (-ABT 1777)
| | | +---Elizabeth Orgal (-21 SEP 1737)
| | +---Richard Andrewartha (ABT 1750-ABT 1806)
| | | +---Sarah Harvey (ABT 1709-ABT 1788)
| | +---Henry Andrewartha (ABT 1777-ABT 1831)
| | | +---Susanna Pearce (ABT 1748-)
| | +---William Henry Guy Andrewartha (ABT 1803-17 JAN 1868)
| | | +---Mary Guy (ABT 1780-ABT 1853)
| | +---William Henry Guy Andrewartha (05 MAR 1833-20 APR 1887)
| | | +---Mary Elizabeth Symons (ABT 1811-ABT MAY 1889)
| +---Mary Maude Andrewartha (11 NOV 1875-25 JUL 1947)
| +---Mary Ann Hoskins (MAY 1850-21 JUN 1919)
Robert Pearce (1952-)
+---Jean Rannard