Where did all of these "couple teams" come from?

Well,I Actully Came Up with 'Team Random'.
I Don't Who Came Up with the Other Ones.

랜덤 actually. So, if i not mistaken, I made "Obivious,Fabulous,Marvelous"
Which I follow a simple recipe : Show that contain 3 guys would make a team couple
For example : GG - Chuck,Nate,Dan
당신 just have to get Chuck to be with someone,Nate to be with someone, and Dan to be with someone.
Cherry,Nair,Derena In that 당신 follow a simple rule, NO BRO-SIS AND NO MATCH.
Chenny,Nenny,Danessa Jenny could only be with one person in a triangle.

The name we just make it up, For people to start calling it, 당신 need to make a pick, 또는 a spot.
Hope I helped you.
Thanks

P/S now i'm actually 읽기 your question.
So like i said, Show that contain three guys normaly make a Team.
And all three guys have to be with someone.
It's clear that THE ENDGAME was made before Trifecta. Because they happen first.
Now Trifecta is ..kinda 더 많이 popular, obviously because they happen after so...
And i think Endgame was the first group couple ever (saw somewhere on 유튜브 ) yay !