Yea, ellag is correct. He is quite a look alike of a russian blue. Esp if he has green eyes. Difficult to see on kittens their adult shape for sure, but yes.
Why did you though he is part siamese? Because of these rather big ears and the somewhat prolonged muzzle? Russians have it too.
These dark phantom rings on kittens are quite common. Although if the proceed to be on an adult RB, they are considered as a fault.
Yeah, you had got yourself a nice look alike of an Russian Blue. What is hers background, do you know it? Is there any possibility she may be of RB ancestry for real?
Ya is a possibility!! The lady I got her from had no clue at all what she was other the maybe calico! And ya she was born July 4th and the rings seem to just be more defined now don't look like there going anywhere!!
If the muzzle continues to be even more prolonged, an alternative to compare to may be the Oriental. These are quite alike modern siameses, but without point, often in solid colors.
But at that moment, she reminds mostly on Russian blue - these are too typically sleek, somewhat prolonged muzzle, rather big ears, etc.