It does look likely that the Shaw's Brow Isabella Gelling could be the d/o William Corjeag. Do you know who granddaughter Elizabeth Gelling born 1826 is?

I had the Braddan marriage of Alice Cavendish & William Gelling but didn’t know who she was. I've only just seen the possible Liverpool baptism for her. It's also a possibility she is sister to Isabella, but there are quite a few Cavendish baptisms in Liverpool and it's not so easy to identify them as Manx as when the Corjeage version is used! I have just looked in familysearch for Alice & William's children but didn't spot a James.

Thanks for the input.