Villagers Despawning

Mobs despawning is fair. Just because your pig or something despawns doesn't mean you get a pig egg.

So i found myself a village and i was working on making how i wanted it and i had them all locked up inside a house i had for them. Later when i came online they had all despawned. It know that they despawned because i also had two hidden else where; in case someone killed them.

So would it be possible for me to get two or three villager eggs for my village?