It would depend on the man and his interests -- but I would use one of the attached letters. I would probably use different colors for a few of them though.
Monika the boomerang font from 8cp or the lassoo? rope font from amazing or cute :)
His name with a bible verse under it like the golden rule or God is love etc. hugs
also depends on the thickness of the towel.probably big n bold n maybe add a cross?sincerely, lynne