Kristian

Also Albanian: https://instatemra.shinyapps.io/emra/

Also Estonian: https://et.wikipedia.org/wiki/Kristian

Used in Russian and Bulgarian. [noted -ed]

The name Kristian was given to 352 boys born in the US in 2016.
More than 99.9 percent of people with the first name Kristian are female.

This name is unisex. I have seen it used often for members of all sexes. I've found that the spelling often changes whether the name looks more feminine or masculine. For example, Christian looks more masculine to me whilst Kristian appears more feminine to me. It is very easy to find nicknames as well e.g. Chris, Kris, Kristie, Krissy etc.

Common in Croatia as well, along with Kristijan...

Kristian is also the Czech form.

Also a boys name in Slovenia, but Kristjan is far more popular.

Earthnut, please do not contribute information about usage in Slovenia for the names that are very rare there. Slovenes want to be fancy and they think it's better to give to a baby a name which is easier to pronounce for foreigners. So originally, Kristian isn't a Slovene name.

Girl name?!
Wow!
I never never NEVER heard this name for a girl. A lot of my friends have the name Kristian but hey, a girl? I just can believe that! I just saw that it is ONE girl in Sweden who has the name Kristian, poor girl.
[noted -ed]

Never knew it could be a girl's name. I love this beautiful name for a boy, but the problem is that in Denmark it is more than overused. I know so many people named Kristian or Christian, among them my brother, who I call Krisjang. And now we just had a new Danish prince named Christian so I'm afraid it will keep being that popular.