Hert was descended from a family with landholdings in Tregony, Penryn, Helston and elsewhere in Cornwall.
It is possible that Hert’s move to Westminster occurred early in 1431, at the time of his second Parliament, when he was party to a settlement of some of the family property in Treluswell (in St. Gluvias) on John Geffrey and his heirs,
On occasion, Hert stood surety for individuals suing out grants of the custody of estates that had escheated to the Crown during the minority of an heir, most notably for his own master Iwardby.
In 1447-8 Hert was admitted to the freedom of the Mercers’ Company of London,
