Technically 2, but they are family, and this is 1 resemblance they had, so worth to mention it together.

Breezepelt and Crowfeather had a littermate. Crowfeather's littermate was a kit named Eaglekit, who died shorty after birth. Breezepelt was the runt of his litter, but when all his littermates died, it was miraculous that he was the survivor.