Ann
My ggrandparents were Thomas and Catherine her maiden name was Cottier and they did move to Merseyside not actually Liverool but Wallasey on the Wirrel. Thomas was the man that changed the name, I have a hand written apprenticeship agreement he signed when he was 12 signed as Cubbon, when he married Catherine the name changed to Cubbin. As I know were the family goes from this point the names are a coincidence. We are most likely related somewere but not from this line.