The name Box Head is a metaphorical play on words. In American English, adding the word "head" after a word signifies a specialty. I.e. Box Head - a person who is a boxer. The words Box Head is also a literal showcase of the characters square head. The character is based on Ognjen, the name is a play on the words Box & Head (a physical rectangle for the shape of the head as well as the act of boxing/fighting).
The hair is based on his hairstyle. The left eye was designed as a swirl eluding to his disability to clearly see from the left eye due astigmatism. The stitches evoke the numerous cuts sustained throughout Ognjen's fight career. The BoxHead character design won an award in the world famous Logo Lounge 13 book.