I like Scarlett. It used to remind me of Scarlet O'Hara but it has become so relatively popular it doesn't any more.
I have mentioned this before but of my SILs said she liked Scarlett enough to use it when her first daughter was born - but her husband's last name is an item of clothing eg Coates or Boote.
I think I prefer Scarlett but I dither about it.
I like Scarlett Eve and Scarlett Katherine.
And as far as I remember she was just Katie Scarlett - she was named after her Irish grandmother who I guess would have been Kathleen?