Lux

This name is totally feminine to me because of the gender in Latin, an extremely gendered language, despite Spanish girl names like Sol and Pilar being El Sol and El Pilar. Luz is a Marian title, and therefore feminine, so I see Lux as feminine being related.

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Lux in Romance languages:
Lumière - French, feminine as a noun
Luce- Italian, feminine as a noun, and name
Luz- Portuguese, feminine
Llum - Catalan, feminine
Lumina- Romanian, feminine.

I thought this name might be useful as a nice diminutive of similar names (Lucius, Lucian, Lucianus, Lucio, etc.)

This name is in use in the Netherlands, where it is a unisex name. In 2014, there was a total of 28 male bearers (of all ages) and 62 female bearers (of all ages) in the entire country:

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- http://www.meertens.knaw.nl/nvb/naam/is/Lux (in Dutch)

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One of those bearers is the son (born in November 2012) of the Dutch singer and actor Jim Bakkum (b. 1987) and his wife Bettina Holwerda (b. 1979), a Dutch musical actress and singer.

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- https://en.wikipedia.org/wiki/Jim_Bakkum (in English)
- https://twitter.com/JimBakkum/status/271644731631603712 (in Dutch; from the official Twitter account of Bakkum)
- https://twitter.com/JimBakkum/status/648529796490727424 (in Dutch; also from the official Twitter account of Bakkum)
- http://www.nu.nl/achterklap/2970048/jim-bakkum-toont-eerste-foto-van-baby-Lux.html (in Dutch)
- http://www.vernoeming.nl/bekende-nederlanders-kindernamen (in Dutch)

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Finally, in Dutch, the name Lux is pronounced as: LUYKS. In other words: it is the same as the pronunciation of the Dutch given name Luuk, except that it has an -s at the end [of the pronunciation].

To me, this is definitely a boy's name. My brother (who's now 22 years old) is named Lux and I believe he was originally named after a boy in a novel from the beginning of the 20th century. I know that there's also a jazz legend that was named Lux as well as several other male persons (my brother has done a little research on the name ;-). It was only recently, since the name Lux showed up on a female character in the virgin suicides that people came to consider it as a female name as well. But I still like it better on a boy, it has a very distinct masculine sound to it, I think.

It says it's a feminine name, but here in France I know just one person bearing the name Lux and it is a boy! Lux sounds more like a boy's name to me anyhow, (despite the gender of the Latin word of origin).