Forget the oil. It's one of the twins that make up the constellation Gemini, and a mythological name on the cutting-edge of fashion; used by Metallica's James Hetfield. 

Castor

One of the jewel names in use a hundred years ago, due for revival along with sisters Ruby and Pearl. 

Garnet

Levi, lighter and more energetic than most biblical names, with its up vowel ending, combines Old Testament gravitas with the casual flair associated with Levi Strauss jeans. 
 Now it's being rediscovered in a major way—Levi has been shooting up the charts in recent years. Extremely popular in the US, it's also a Top 100 name throughout the English-speaking world as well as in a diverse range of countries from Germany to Brazil.
 
In the Old Testament, Levi was the third son of Leah and Jacob, from whom the priestly tribe of Levites descended; in the New Testament, Levi was Matthew's given name before he became an apostle. It is suspected that Levi derives from the Hebrew word yillaweh, meaning "he will join." 
 Levi received a lot of attention as the sons of Matthew McConaughey, Sheryl Crow and Sara Gilbert.
 In the Thomas Hardy novel Far from the Madding Crowd, Levi Everdene is the father of the heroine. 
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Levon is a related name.

Levi

The streamlined Spanish Ruben is much more popular than the original Biblical Hebrew version in the US.

Ruben is definitely a simpler and more intuitive spelling of this rich attractive name. Ruben and Ruby are the perfect male-female companion names.

Ruben

kymyit's list "Names I like" of 4 great name ideas: Castor - Ruben!

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