Mike,
I regret that I know very little of this branch. My great-great aunt Mollie (?) Boyde was born c1892 in Douglas and emigrated to Canada just before WW1. At some point, she married an Agnew but I do not yet know whether he was Manx or Canadian. Family rumour says two children were born in the 20s. In 1953, the Agnews were in Penticton, British Columbia and the husband reportedly worked for the Canadian Pacific Railway. I have found one reference to the death of a female Agnew in Penticton, BC but the Christian name and the date of birth do not match the information I have.
James McMenemy
Researching Agnew, Aylmer, Boyde, Callister, Comaish, Crellin,
Cretney, Gelling & Kelly - all on the Isle of Man.