yes it is.
Probaly but Casen is way cooler than Devin
Leo the cool lion that's cool
its not
One cool nickname for Fiona could be "Fi." It's short and easy to remember.
The nickname of "The personification of cool" was given to James Dean.
skywalker
brantie
cool man
court
I think a cool nickname for Madlyn would be Maddie, or you could even use Lyn as your nickname. Maddie is a more casual nickname while Lyn is a little more formal, so it depends on what type of nickname you want to have.
cool bananas
Yes, many people call her 'Chezza'. What a cool nickname.