Helena, a famous model of the glorious 90s doesn't have a particularly square jaw, but I still wanted to include her in this site for the great cheekbones. Her facial structure is very particular, I would even say unbalanced: cheekbones are disproportionately developed when compared to the rest of the face. With her clear eyes, it gives her a really unique look. Her ethnic type is difficult to decipher and for good reason: her father is Danish, and her mother Peruvian. I bet the cheekbones comes from the Peruvian side.

C+ jaw angle, B chin, and round jawline for Helena!