What breed mix is this cat? If any?

I've learnt alot about cat breeds on this site and think that the probable father of Ziggys babies is a 'breed' as apposed to regular DSH. It's because of the blue crossed eyes that I think is, although I may be wrong of course.

He is a really big cat, and very muscular. You can see his shape very easily under his very short fur. The brown on his back is a round patch. There is more white before his tail. His tail is darker then his back. - Don't know if this is relevent. Here he is:

Looks like the coloring of a snowshoe or a ragdoll mix. Even tho Raggys re longhair, if a Ragdoll bred a shorthair you'd have predominately SH cats. By chance was there any longer haired kittens in the litter?

Yeah a brown and white tabby, and a red and white tabby and possibly the other red one - aren't decided yet, they are only 6 1/2 weeks

He looks a bit like he could have some siamese with him, with the long face and pointed colour although he's pointed with white like the Snowshoe but that could come from the non-Siamese part of his ancestry.