Josselyn's father died in 1504, while his son was a minor.
By 1532, he had married Anne Grenville of Wotton Underwood, Buckinghamshire.
His wife was one of the gentlewomen of Queen Catherine of Aragon.
He left all his possessions to his daughter, Margaret Foxley née Josselyn.
This article about a 16th-century member of the parliament of England is a stub.