Should sims have first, middle, AND last names? Should they also be allowed to have preferred ames?

I don't see a need for middle name, since it wouldn't be used for anything anyway, but I think a nickname/diminutive system would be great. In my native languages we use diminutives a lot. For example, maybe close friends could use the diminutive (so, you'd see David listed as Dave in your contacts if he's your friend), or Sims could use them with babies (also in contacts, in notifications and so on) automatically.