Hello Marg,
I have quite a few 'Johns'in my Skillicorn family tree.
Do any of these names mean anything to you?
James Skillicorn -wife Catherine Quilleash,John Thomas married Margaret Fargher,Another brother Joseph was born 1826, and another James born 1830 who married a Catherine.Their father was a John Skillicorn who married a Jane Davies.That John's father was also a John.
Too many Skillicorns to sort them all out.