Eliza Creer married John Cain on Aug 21 1836 at Kirk Braddan. I believe she died May 11 1902 in Patrick. I have no evidence of her parentage - but as she was married in Braddan she most likely would have been christened there. If you have evidence to suggest she was born in 1812 then there is a good candidate - Eliza (not Elizabeth) christened Sep 6 1812 in Braddan to Daniel Creer and Catherine Wade (I have a fair amount of information on this family if you think it fits and you are interested) . There were no other Eliza Creers born in Braddan around this time. There was only one other Elizabeth Creer christened in Braddan in 1811.
cheers
John