I am researching the Nock/Wilkinson connection too.
Stories have been passed down the Welsh side of my family of the Nock gunsmith connection.
My great grandmother was Elizabeth Nock 1862-1932.
Her father was Richard Nock 1828-1909.He married three Wilkinson sisters in succession!The appearance of the name Wilkinson is this stage is probably just a co-incidence.
His father was Henry Nock 1795/96 - 1837?I believe that this Henry Nock was a nephew of the famous gunsmith Henry Nock 1741-1804 and I am working on establishing a definite route between the two.Gunsmith Henry Nock's Wilkinson successors progressed to manufacturing bayonets and then swords.
Have lots of info on the Wilkinson Sword history going back a long way.
Gunsmith Henry Nock did not marry, but his adopted daughter married the Wilkinson who took over the gunmaking business.I have a copy of his will.
I live in Surrey UK.Perhaps we may speak to share info to our mutual advantage.