Anybody saying that Lucien can be a girl's name is very skilled at pulling the name trend off very well. Us females are so good at pulling a masculine name off just by bearing the name. Most feminine names wouldn't be able to be pulled off very easily by males, not even traditional boy names that switch to girl names only like Madison or Lindsey, especially Shirley! Just one of that, "girls are better than boys" characteristic categories! All males should have masculine male names rarely unisex, but females can have feminine or masculine names even if it's so popular for boys. A girly girl could have the name Mason, and a tomboy could have the name Sophia, but no male should have any feminine girly name. I wouldn't say all males should have strong male names myself! There could be a guy named Emily or Ashley or even TIANA! Though society agreed that, all males should have masculine names only, but females can have feminine or masculine names, since a girl with a name like Sophia is normal, or Michael as her name is cute and unique. And a boy with a name like Michael is suitable, but the name Sophia on a boy is just terrible. There are also unisex names that all suit girls better in the majority's opinion and a lot of unisex names can't be masculine anymore. I don't think there is one name out there that wouldn't suit a female, there are a lot of names that can't suit a male. Though male names might sound cute on girls and they bear those names as strong or soft women tomboy or girly, names like Antonio can't become as unisex as Taylor. It still originates as masculine and it will remain so. It's not like every girl will have a boy's name, otherwise it's not unique, it's trendy. There will always be females as the years go on with feminine names like Christine. Personally, I like Lucien/Lucian better for a boy but on a girl it's fine. Just pair it up with something feminine like Marie or Elizabeth, especially if it's the grandmother's first name, then she will be named after her grandmother, LOL! For a girl I prefer Lucy or other feminine versions of the masculine counterpart.