Gian \gian\ as a boy's name is pronounced jon. It is of Italian and Hebrew origin, and the meaning of Gian is "God is gracious". Respelling of John, often used in combination with other names such as Gian-Carlo, Gian-franco, and Gian-luca. Gianni is equivalent to Johnny.
Gian has 3 variant forms: Gianney, Gianni and Gianny.
For more information, see also the related name Giovanni.