Bull Name Meaning. English: nickname for a strong, aggressive, bull-like man, from Middle English bul(l)e, bol(l)e. Occasionally, the name may denote a keeper of a bull. Compare Bulman.German (mainly northern): from a byname for a cattle breeder, keeper, or dealer.ull Name Meaning. English: nickname for a strong, aggressive, bull-like man, from Middle English bul(l)e, bol(l)e. Occasionally, the name may denote a keeper of a bull. Compare Bulman.German (mainly northern): from a byname for a cattle breeder, keeper, or dealer.