Hello Erin
The Cubbon line has been difficult to confirm. I cannot rule out some connection, but as yet I have not gone back far enough and don't have solid connections/proof beyond 1800. I have had more success tracing the non Cubbon female lines

Funny really, I never knew any others with the name Cubbon/Cubbin beyond close family but now I find we're everywhere....I don't know if my father's observation that "we're all related" is of any concellation..
I see we share other names too

I have Cottier, Shimmin, Clague, Watterson, Cain and Cannell.
Ann