While
Katie and its variants may seem too insubstantial for a fullname, it makes for an endearing nickname. Too me,
Katie is cute, fun, easily recognizable, and warm.
Katie is like warm blanket from childhood. Yes, it has experienced a lot of wear and tear, but it is dependable, comfortingly familiar, and filled with memories that give it character.
Katie isn't a name on my PNL, but I like it overall and can see the appeal as a nickname.