It has been a week since I made the post and I didn't get a lot of suggestions but its alright ^^ Anyways, let's get straight to the point :D Here are the beautiful meanings of the suggested names :)

a.) Evermores - It meant always / forever. Simple as that but more of its meaning, we will always and forever ship SehunxKrystal fandom. :)

b.) Juveniles - pertains to being young and it's detonation is like teenagers just being reckless and that kinda goes with the 'forever young' thing. (from -aurora) short word: juvies :)

c.) Exquisites - It meant beautiful, delightful, and perfect as well as excellent.

d.) Serenes - the word meant a pure and calm person. It can also be pertained to Sehun and Krystal being maknaes. (from PreciousSerenity)