|Periodic table, found via UNIFORM on Tumblr|
Names with five-inspired meanings include Japanese Goro (or Gorou), which is traditionally bestowed upon the fifth son in a family; the Akan people of Ghana and the Côte d'Ivoire have a similar unisex name, Enu, which means "fifth-born child." Then there's Pompey, from the Roman family name Pompeius, which is from a Sabellic word meaning "five," and the Quins — from Quintus, there's plenty of options here that would work as given names for a child of any birth order (or born in May) or as a nickname for one whose given name ends with "IV." I particularly like plain Quint, feminine Quintina, Quentin and Quinton, and classic unisex choice Quinn.
Lovers of awesome sci-fi movies probably already thought of The Fifth Element, a film which is responsible for launching Lilou onto the French popularity charts. Milla Jovovitch's character actually spells it Leeloo. In what I'm aware is a pretty nebulous connection, here are some names of other characters in the movie — Korben Dallas, Jean-Baptiste Emanuel, Vito Cornelius, Ruby Rhod, Munro, Fog, Achen and Omar.