Is there a list of random backgrounds for summoned creatures

[Red Bear]

maybe it's a stupid idea and after trying it once I will realize that it's too much work and it's not worth it, but I have been thinking that it would be cool if I could roleplay a little bit a summoned creature (intelligent ones of course). For example if a player summons a pixie with conjure woodland creatures (I'm playing 5th edition but it's irrelevant) I would like to be able to have a background for it.

So do you know of anything that I can use for this or did nobody ever thought it's a good idea?

[LordEntrails]

No idea. Have you checked donjon? That would be the first place I look. Then try Google for something like "random background generator"