why's a heir called heir? or a bard bard? where's the connection between their powers and titles?

That is a hard one to answer! I don’t think I have a solid answer to it, actually, there’s some rhyme and reason to them but I wouldn’t be able to tell you 100% why right now. It may be some Archetypes Hussie planned or adapted, it may be references to things I haven’t thought quite yet. I’m sure knowing this is 100% certainly is one of the big keys to knowing what Hussie intended the Classes to be.