Kru is a short, distinctive masculine name with several possible origins. It may derive from the Kru people of West Africa (primarily Liberia and Ivory Coast), representing an ethnic heritage. Alternatively, it could be a modern invented name, an abbreviation of longer names, or inspired by the Thai word 'kru' meaning 'teacher' or 'mentor.' As a given name, Kru is extremely rare in Western naming records. Its brevity gives it a contemporary feel, while its unusual nature makes it memorable. The name has a strong, bold sound despite its single syllable and might appeal to parents seeking a unique, culturally significant, or simply distinctive modern name for their son. Kru's simplicity makes it versatile across different languages and cultural contexts.

Koji, also written as Kōji, is a common name among men in Japan. It is also featured as a character name in many anime series.