+--Richard Pierson  (1516-)
         +--Richard (or Henry) Pierson  (1545-BEF. 1567)
         |  |  +--Edward Church 
         |  +--Elizabeth Church  (ABT. 1516-)
         |     |  +--Liman Hendon  (ABT. 1485-AFT. 1540)
         |     +--Thomassine Hendon 
      +--Abraham Pierson  (ABT. 1590-4 JUN 1650)
      |  +--Johanna Harwood 
   +--Thomas Pierson  (1614-1701)
   |  |        +--John Drake 
   |  |     +--Bernard Drake  (1530-10 APR 1586)
   |  |     |  |        +--Thomas Granville 
   |  |     |  |     +--Thomas Grenville  (ABT. 1449-18 MAR 1512/13)
   |  |     |  |     |  +--Elizabeth Gorges 
   |  |     |  |  +--Roger Grenville  (1477-7 JUL 1524)
   |  |     |  |  |  |  +--Otho "Otes" Gilbert 
   |  |     |  |  |  +--Isabella Gilbert  (ABT. 1456-)
   |  |     |  |  |     +--Elizabeth Hill 
   |  |     |  +--Anne "Amye" Granville  (1513-18 FEB 1576/77)
   |  |     |     |  +--Richard Whitleigh  (ABT. 1449-)
   |  |     |     +--Margaret Whitleigh  (ABT. 1478-)
   |  |     |        |  +--John Trenowth 
   |  |     |        +--Margaret Trenowth  (ABT. 1460-)
   |  |     |           +--Honour Tregarthin  (ABT. 1432-)
   |  |  +--John Drake  (1566-11 APR 1628)
   |  |  |  |  +--Bartholomew Fortescue 
   |  |  |  +--Gertrude Fortescue  (1538-10 FEB 1600/01)
   |  |  |     |  +--Morris Moore 
   |  |  |     +--Ellen Moore  (ABT. 1505-)
   |  |  |        |        +--John Bonville 
   |  |  |        |     +--William Bonville  (30 AUG 1393-18 FEB 1459/60)
   |  |  |        |     |  |     +--Henry Fitzroger 
   |  |  |        |     |  |  +--John Fitzroger  (ABT. 1341-ABT. 1372)
   |  |  |        |     |  |  |  +--Elizabeth de Holand  (ABT. 1320-13 JUL 1387)
   |  |  |        |     |  +--Elizabeth Fitzroger  (1371-10 APR 1414)
   |  |  |        |     |     +--Alice Bonville Cheddar  (ABT. 1346-)
   |  |  |        |  +--John Bonville  (ABT. 1435-1491)
   |  |  |        |  |  +--Isabelle Kirkeby  (ABT. 1403-)
   |  |  |        +--Cicely Bonville  (ABT. 1488-)
   |  |  |           |  +--William (Dennis) Dennys  (ABT. 1416-)
   |  |  |           +--Alice Dennys  (ABT. 1442-AFT. 1500)
   |  |  |              +--Joan Saint_Aubyn  (ABT. 1418-)
   |  +--Mary Drake  (1594-NOV 1643)
   |     |  +--William Button  (ABT. 1537-)
   |     +--Dorothy Button  (1568-13 DEC 1631)
   |        +--Mrs William Button  (ABT. 1541-)
+--Thomas Pierson  (1653-29 NOV 1722)
|  +--Mary Harrison 
Susanna Pierson  (BET. OCT 1689 - 20 SEP 1-30 JUN 1765)
|  +--Henry Dixon  (ABT. 1633-AFT. 1680)
+--Rose Dixon  (1661-29 SEP 1722)
   +--Rose LNU  (ABT. 1637-AFT. 1671)