note , names suggested were from you guys not from me .

Minerals 

Yoowook is famous for their trademark which is pouring water on each other during smtown . [ apply your science facts about minerals here / as in the minerals we intake ]

Waterdroplets

Yet again something related to water which is their trademark

Dreamers

Both Ryeowook and Yoona love to stare at each other . Just kidding . But they both have dreams and they work for it

APeace

Remember SMTOWN in LA , they posted a picture of Yoonwook alighing the plane with their peace signs ?  A stands for ace . Of course Yoonwook fandom are the most peaceful fandom right ?