Minecraft wiki entry for Zombie_Villager, associated text: A cleric zombie villager appears alongside a cleric villager in every igloo basement (a normal zombie villager in Bedrock Edition and a cleric zombie villager in Java Edition). One of them transforms into leatherworker, due to the workstation (a cauldron). They also generate as part of abandoned villages. Zombie villagers generated in both of these structures do not despawn naturally.