Being innocent when it comes to the "Felix" lapse above I hereby admit Assurbanipal having been not entirely serious a suggestion. Here in Bordeaux I know both a Washington (from Brazil) and a much more common but in french pronounciation lovely (I find) Davide.
I think, having gotten a more than old-fashioned (not even popular in the middle ages and no, I won´t admit what it is, though one or the other reader might already know) first name by my parents (got myself another one; lent from my nickname at age 16), I am all on your line and for a practical, child-friendly first variety and then; do have a ball with Zoroaster and/or Mithridates as second name, how about that to restore peace at home?