William de Chambernon
William was born in Ifrancombe, Devonshire or Cornwall, England.  He died in 1304.

 Joan de Ferrers
Joan was born about 1252 in Ifrancombe, Devonshire or Cornwall, England.  She died after 1280.

 Margaret de Champernon
Margaret was born about 1280 in Ifrancombe, Devonshire, England.

 Henry IV de Champernon

 John de Champernon