How to make villagers

Spawning

Villagers only spawn naturally in NPC Villages. They can also be spawned with spawn eggs in creative mode. They will never despawn even if the player wanders away from them. Unlike other mobs, they won't leave their village even without a barrier (such as a fence) preventing them from doing so.

Villagers can also spawn if the player uses a splash potion of weakness on a Zombie villager and feeds it a regular golden apple. It will then shake and turn into a villager after 2–5 minutes. This tactic can be useful to repopulate villages, to add more citizens, and to create a village if you can't find one.

http://minecraft.gamepedia.com/Villager