I tend to like surname names (well, I don't often anyway, but when I do ...) on the gender they are rarer on. Which definitely means
Ashley for boys. Also, I find myself loving many names from "Gone with the Wind" -
Ashley (b),
Scarlett,
Rhett,
Honey etc. etc. etc. Sadly I don't know that I'll ever be able to use
Ashley *cracks out the violins*, because I love
Scarlett for a girl even more, and both couldn't appear in one sibling set without appearing theme-y.