The name Theon is a boy's name of Greek origin meaning "godly". Theon and is often added to lists like Cool Boy Names From Ancient Cultures and discussed in our forums with posts like "Build a sibling set together!".
From the experts:
Theon, an ancient name attached to a noted Greek teacher of mathematics and astronomy, also father to the first woman mathematician, might appeal to parents in this field. You can think of Theon as Theo with something a little extra.
Theon is also the name of a major character in Game of Thrones -- albeit a rather notorious character, Theon Greyjoy, who is known as Reek after undergoing months of brutal torture at the hands of sadist Ramsay Snow.