Allin is a unisex name of English origin, meaning "little rock" or "harmony." It is a unique and modern name that can be used for both boys and girls. Allin is a strong and impactful name that exudes confidence and individuality. People with the name Allin are often seen as independent, determined, and ambitious individuals who strive for success in all aspects of their lives. Overall, Allin is a powerful and striking name that is sure to leave a lasting impression.