Born about 1310, he was the son of John Northwood (died 1318) and his wife Agnes Grandison, daughter of Sir William Grandison (died 1335), and thus the nephew of John Grandison, bishop of Exeter.[2]
^Diocese of Ottery St Mary. The Collegiate Church of Ottery St Mary Being the Ordinacio Et Statuta Ecclesie Sancte Marie De Otery Exon. Cambridge University Press. p. 45 (footnote).