In 1678 John Jeffery was co-executor and a beneficiary of his father's will.
Marriage Information:
John married Mary Tregidgon, daughter of Pascow Tregidgwan and Grace, about 1675. (Mary Tregidgon was born about 1655 in Gunwalloe, Cornwall and was buried on 11 Nov 1722 in Cury, Cornwall.)