WHAT CAT BREED ARE THESE TWO KITTENS?

You may not like my answer, but it’s the best I can do.

They look to me to be Maine Coons or perhaps Ragamuffins mixed with a cat with Tabby coloring. I know you said not to say "Domestic Longhair", but that’s really the most concise answer one could give. As strays, they’re likely mutt kitties (which doesn’t for a second make them any less cute, just harder to qualify).

The problem most people have in naming a specific breed is they don’t understand the difference between the breed of cat and the coloring of the fur. Yes, there is a difference. For example, most people would call this a Himalayan cat:

http://www.countrygal.info/bailey3.jpg

But in reality, it’s a Persian cat with Himalayan coloring. Himalayan isn’t a breed, it’s a distinction of coloring ("Tabby" is also a color distinction, not a breed). Technically, what we typically understand to be the Siamese coloring (light coat with chocolate colored ears, feet, nose, and tail) is really the Himalayan coloring on a Siamese cat. See the similar coloring on the cat below?

http://www.kitten-stork.com/images/traditional-siamese-cat.jpg

The reason most people would tell you Domestic Longhair is because without papers, it can be nearly impossible to determine a cat’s true lineage. Did you know that a female cat in heat can take genetic material from multiple toms, therefore giving birth to kittens with different fathers in the same litter? If you’ve ever seen a litter of stray kittens, you might notice that one is black and two are tabby and one is calico and one is white with black spots. It happens. So nailing down an exact breed of a stray is very difficult.

But mutt kitties are fun too! And just to make it seem as though I didn’t completely hope to crush your dreams, here are some pictures of kittens that are the breeds the kittens you pictured might be…

Ragamuffin kittens:
http://www.valleycat.fsnet.co.uk/Geno%27sbabies.jpg

Maine Coon kittens:
http://www.pictures-of-cats.org/images/free-maine-coon-kittens-21112371.jpg
http://www.icoonscats.com/maine-coon-kittens-9weekskp.jpg

Domestic Long Hair – Gray And White , hence the name on the pics.

"domestic" is the breed. it means the breed is unknown.

if they had a breed , they would have papers showing ancestry.

breeds are a human intervention thing. without humans, all cats would be domestics. no breed occurs naturally.

Ocimom is right – their colour and pattern is Blue Mackerel Tabby and White.

But they very likely don’t have any "breed" in them so they just get classified as a non breed cat ("Domestic") and by their coat length ("Longhair") . Hardly any cats are a ‘breed’ –only about 3%.. a few more are a mix of a pedigreed cat and non-pedigreed but that is not common anyway considering the small percent of pedigrees, and mixes are becoming less common as more pedigreed kittens get neutered early and are not allowed to roam freely and breed. The great majority of cats dont have any pedigreed ancestors. . It is a very different situation than dogs where most of them DO have some breed in them. Controlled breeding of cats has for the most part been on a much smaller scale and far more recently started, than breeding of dogs. . The vast majority of cats have just bred on their own randomly .
But the breeds came out of that random domestic cat population as people just selected certain types of cats they liked and bred them to emphasize some qualities and to breed out other traits. So it is not surprising that many non-pedigreed cats might resemble a breed. They might even have the same distant ancestors as some pedigreed cats.

But it’s not totally correct to say that there are no naturally occuring breeds as one answerer said. Some of the breeds are considered to have originated as a "natural breed" In earlier times when places were more isolated and new people werent moving in with other types of cats , certain kinds of looks of cats developed in specific geographical areas.
But it is correct that these are mostly preserved with human intervention now. for just one example, Norwegian Forest Cat: some Norwegian people started an organized breeding program to preserve the distinctive longhaired farm / forest cats they called "Skogkatten" (Forest Cats) because they were in danger of extinction due to mixing with shorthairs that became more numerous. (and the shorthair gene is dominant) So the Norwegian Forest Cat did come from a "natural breed" but has been preserved in controlled breeding programs.

The Maine Coon came from longhaired domestic cats of the NE US. so they probably have some distant relatives who would just be called DLH. but there’s no way to know if these EXTREMELY cute kittens have any distant cousins with "papers" . But they’re very adorable no matter what they are called.