Dian /di-an/ [2 sylls.] as a girls' name. Dian's name origin is Latin, and the name Dian means divine.Dian is an alternate form of Diana (Latin). Dien is a familiar last name.elow is a graphed comparison of the usage of Dian and corresponding names. Prominent varying forms of Dian ranked in the Top 1000 are Deana, Deandra, Deann, Deanna, Dee, Deedee, Dena, Diana (#297 last year) , Diane, Diann, Dianna and Dianne.