For imagicraft, I don't think I played or play that but lets see. 1996, my brother on my account. Yes you have no proof but you can research his name if wanted and see on facebook, that he is as well born in 1996. Now let me look for legendarycraft as it has probably been sometime since I quit minecraft besides TharCraft, and that also tells why my brother recieved my account. Idk what that one is. I'm researching right now and I'll ask my sister when she gets home. I don't think I played that but yes I do use enjin obviously I don't think I played much of those servers besides the now done Opscraft. I don't quite know what it is for Legendary. I'd ask my brother but obviously he wouldn't tell me if he has given my account to any of his friends. There isn't much farther you can go with this. I'll look into it and ask some of his closest friends through a conversation.
EDIT: For legendary craft these are guess as you shouldn't even consider them guess with no assumptions but theories. Also if you need to find my brothers account on a website, pm me and I can show you if needed.