Hi A !!!!
Courtney is much better on a boy imo.
I dislike Kortni or every variant spelling of it.
I saw in the popularity section that this name is nowadays mostly used only on girls and that everywhere its peak was in about 1994-1996 while it desappeared from rankings about in 2003-2005.
Do you know why it was so popular in 1995?
Despite I prefer it on a boy I would never use it because it seems too much the name of a breed of dog imo.