Skewys came from an old-established Cornish family which derived its name from its place of origin in the parish of Cury. As ‘lord of Skewys’, in 1386 John’s father granted to James Gervase all his property in Benallack in the parish of Constantine (near Helston), a transaction which John himself confirmed. The remainder of the family property scattered throughout Cornwall passed intact to him, and it was at Skewys that, by virtue of a licence granted by Bishop Lacy of Exeter at Helston in June 1437, he was to build his own oratory.
John and his father were evidently men of means: in 1389 one or the other had pledged as much as 2,000 marks before the justices of assize at Launceston as surety that Richard Rosenbondere would keep the peace. They were also well connected among the gentry of Cornwall: the younger John was often asked to witness deeds and to act as a mainpernor. On 25 Oct. 1397, shortly after the prorogation of the Parliament which he had attended as a burgess for Helston, he stood surety at the Exchequer for William Tregoose when the latter was given custody of the lands of an outlaw in Cornwall. On another occasion he appeared in Chancery on behalf of a cleric who had accepted the benefice of St. Gorran under cover of a papal provision.
Skewys last appears as a witness to a Cornish deed dated May 1439. In 1447 it was as his widow that Marina Skewys conveyed property in Skewys, ‘Trescrewyn’ and Treranguyth to Ralph Joran.
