If his parents' names and address are given on the marriage cert the next step is to get his birth cert using those details. As next of kin you shouldn't have a problem getting this. If you already have his birth cert you should be able to get his parents' marriage cert using the details on the birth cert - then their birth certs from details on their marriage cert - and so-on, going back one generation at a time.

I'm assuming you have proof that he was born in Douglas IoM, not the UK Douglas?

You can order these certs online. See "Contacts" at the top of the page: www.gov.im/registries/general/civilregistry/

You could try asking them for his parents' marriage cert at the same time. You may need to send them a photocopy of your marriage cert.

When you get back far enough (births pre-1911) please post the details here, using "Post Response".

Sue