
To be honest without a registered name, name of breeder or his mother if he is Kennel club registered you would be unlikely to find the details easily.
If you contact the breed clubs and ask the secretaries if they have the Breed Records supplements close to his birth date they might track a litter down. Thing is breeders have up to 12 months to register a litter.
He could of course be unregistered or even registered with one of the registries that provide pretty paperwork for pet puppies with no traceability or verification of pedigree, in most peoples opinions not worth the paper they are printed on.