well, i've mostly seen it used as a girls' name but i guess it could be used a a guys' as well =u= other people named Yuki -Yuki Nagato (The Melancholy of Haruhi Suzumiya) -Yuki attraversare, croce (Vampire Knight)
Not Necessarily..Yuki is unisex name (that means the name is dato to both boys and girls)..while Yuki is a common it might be dato to più females than males in Anime it seems anyway doesn't make it solely a female's name.