In minecraft 1.3.1, the different types of villagers are now important as they trade different things. However, not all types will necessarily spawn at once. If I occupy a village that lacks, say, a blacksmith, can I encourage one to spawn, perhaps by building a forge?
Just build more houses of the normal type until you get a blacksmith. The profession of a new child is random, and independent of its parents’ professions.
Source : Link , Question Author : Yamikuronue , Answer Author : fredley