1) I took the following surnames which I know have Cornish ancestry from Ancestry DNA - Bolitho, Congdon, Pascoe, Treloar, Veale, Vine .
2. I then found my best matches shortest connection wise to them at Wikitree.
3. I then found my best Gatley profile connection wise at Wikitree. That because I have a larger match to a Gatley than to a Gatty within my cousin matches.
4. I then compared my best Gatley profile and the best Gatty profile, connection wise, I have with Bolitho etc . I didn't use my own profile because the number of connections are greatly increased due to my half aunt's father(not a blood relation ) being one of the links.
Gatty-20 : Bolitho 21 degrees, Congdon 24, Pascoe 21 , Treloar 21, Veale 20, Vine 21.
Gatley-35: Bolitho 13 degrees, Congdon 13, Pascoe 13, Treloar 13, Veale 12,Vine 11
As far as I can make out these are 'by marriage' connections .