Tonkin family Penzance 1790's
I am trying to locate details parents etc. of John Tonkin born in Penzance about 1794.
After moving to Shrewsbury the name changes to both Tonkinson then Tomkinson. He married Martha (born in Waters Upton 1787) and the marriage was registered as Tomkinson. What was Martha's name before marriage?
I believe John's children were Thomas. John. Sarah. Charles. Harriet. Jane. (Charles is my Gt. Gt. Grandfather).
Does anyone have any info that would point me in the right direction please.