Plumpton

Generation 19:

Isabella Plumpton

+Stephen de Thorpe b. circa 1385

--Stephen de Thorpe b. circa 1410

--William de Thorpe

--Henry de Thorpe

Generation 20:

Sir William Plumpton

+Alice Gisburn

--Sir Robert Plumpton

--William Plumpton

--Brian Plumpton

--George Plumpton (cleric)

--Thomas Plumpton

--Richard Plumpton

--Isabella Plumpton

--Jane Plumpton

--Katherine Plumpton

Generation 21:

Sir Robert Plumpton

+Isabella le Scrope

--Sir William Plumpton

Generation 22:

Sir William de Plumpton

+Christian Mowbray

--Sir Robert Plumpton

Generation 23:

Sir Robert de Plumpton, Lord Plumpton

+Lucia de Roos

--Sir William de Plumpton

Generation 24:

Sir Robert de Plumpton

+Isabella de Westwick

--Sir Robert de Plumpton, Lord Plumpton

Generation 25:

Nigel de Plumpton

+Avice de Clare

--Sir Robert de Plumpton

Generation 26:

Robert de Plumpton

+Unknown

--Nigel de Plumpton

Generation 27:

Nigell de Plumpton

+Juliana de Warewic

--Robert de Plumpton

Generation 28:

Peter de Plumpton

+Lady Helena

--Nigell de Plumpton

Generation 29:

Eldredus de Plumpton

+Petronilla Unknown

--Peter de Plumpton

Generation 30:

Nigel de Plumpton

+Hilda Unknown

--Eldredus de Plumpton

Generation 31:

Petrus de Plumpton

+Unknown

--Nigel de Plumpton

Generation 32:

Nigelus de Plumpton

+Maria Uknown

--Petrus de Plumpton

Generation 33:

Robert "de Plumpton"

+Arelete A. H. de Normandy

--Nigelus de Plumpton

Some genealogies link this line as descending from Robert I of Normandy (father of William the Conqueror); however, I am unable to find any clear information of there being a link here.