Yazan, pronounced as (YA)rn + (Z)oom + y(A)r(N), is a Farsi word that means resolved, determined. It is not an Arabic/Quranic word, but since the meaning is good you can use it. It seems to be mostly used for boys, but some people use it for girls as well.
Yazan, pronounced the same as above, is also a Turkish name for boys, some sites say it means "writer", but I cannot verify this.
Yazan, pronounced as (YU)mmy + (Z)oom r(UN), is an Arabic name for boys. It is the name of a tribe in Yemen. It is said they are descended from Said bin Dhee Yazan, who died in 574 CE and freed Yemen from Abyssinian occupation. This is not a Quranic name or related to Islam, but since it doesn't have a bad meaning you can use it as a name.