Bernard was almost certainly related to both James**and John Janyn*, but nothing is recorded of his origins beyond the findings of a sixteenth-century visitation which asserted that he was the son of one Thomas Janyn of Hampshire, although this cannot be verified from contemporary sources.
Janyn was called upon by several landowners with estates near Guildford to act as their feoffee, including the holders of the manor of Loseley, and the senior branch of the Wintershall family, seated at Wintershall, despite his earlier disputes with their relations at Bramley.
