I have never heard this name used by a Persian. Maybe you mean Mosen (Mohsen). As well as Kurdish which dear Tisia mentioned, in various dialects spoken in north of Iran, Mazen means great however I don't think they use it as a first name. As a side note, Mazdad is a very beautiful name. It dates back to Avestan. Do you know its meaning?My son is half Persian and I do not speak a word of Farsi, nor am I familiar with the alphebet. I would like to trannslate his name for many reasons. His name is Mazen . Is there anyone that can help me?