I have just found information on
https://discovery.nationalarchives.gov.uk/results/r/6?_q=stephen%20hoskyn which would seem to confirm that Stephen Hoskyn (1655) did indeed have a second wife and the children that I have already mentioned above.
"Short title: Hoskyn v Hoskyn.
Document type: Bill only.
Plaintiffs: Joan Hoskyn, spinster of Fowey, Cornwall, Charity Rounseval (widow of Gregory Rounseval, gent deceased) and Richard Chapman (said Joan Hoskyn and Charity Rounseval being two daughters of Stephen Hoskyn, gent deceased ate of Egloskerry, Cornwall).
Defendants: Peter Hoskyn, Philip Welsh, Richard Hornabrooke and William Hoskyn."
There are many references to Hoskyns in the documents, but I find them hard to understand. Maybe someone else can whittle out the salient information and let us know what it is...
Are we having fun yet?