Do you know where she was born? I have the names of a number of my great grandmother's siblings, all of them born in Lonan, two of which were boys with the last name Kermode. They were of an age they would have been having their children about the time of Caroline's birth.
I have come across Frank Kermode, who in a series of letters from HM ships during WWII addresses my grandmother as Aunt though she had no siblings, and he had not met her. I believe, instead, she was his first cousin, from one of her uncles (as I don't find any Qualtrough relatives who married a Kermode other than my great grandmother).
Meg