Hello. Can anyone help?

I am planning a trip to the Isle of Man in May and I would like to try and find any family I may still have on the island.

My paternal grandmother was born in Peel. Her name was Phyllis Quine. She moved to Birmingham, England during the war and married Harry (Henry) Simmonds. They had 3 children. Graeme (who lives in Canada), Roger (my father) and Helen. Phyllis died in 1980. I know that she had 2 sisters and a brother. Mable, Gladys and Arthur. Arthur lived in Germany until his death.

I want to do this in secret so I am not asking my father and the rest of the family.

Could you point me in the right direction?