I wondered if the 'better ' is a reference to a gambler.
I have no idea though. Can we help with the answer that would give you the fourth letter (which you think may be R)?
Biblical quote - "Simon, I shall call you Peter, as you are like unto a rock" (Jesus, on recruiting Simon as a disciple) Also, Latin "petra" is "rock", (as in "petroleum", literally "rock of oil") French is "Pierre" from the Latin root.
I have no idea why suggestions should be sent to him!
I am pretty sure it'll be PETER but I can't explain the suggestions. I have looked at some info on St Peter hoping he was the patron saint of ideas but sadly he isn't
could your 4d.be room(space) ful (isnt empty)=roomful which means (a number or quantity sufficient to fill a room (nothing in it) thus giving you a different letter fo 13a .