No, no, no --- no reason to panic! If he has any white on his paws then yes, he would be a Birman most likely. Otherwise he would be a colorpoint Persian. What color do your papers say he is? At one point the Himalayan was considered a separate breed (due to the introduction of Siamese blood to create the pointed colors) but within the last decade or so the registries have been combined as any Siamese blood is so far back I doubt it even would show up on any pedigrees.