MCF's COMMON 8

Do you want to play a game? It’s been nearly a year since the last edition of MCF's COMMON, so I’d say we’re well overdue.

Below I'm going to list FIVE groups of FOUR things. Each group has some thing in common, some thing that links each quartet. It's up to you to guess, and I'll reveal the answers tomorrow.

20 items. 5 COMMON bonds. Can you name them all?

GROUP 1
(A) Aang.
(B) Charles.
(C) Nick.
(D) Telly.

GROUP 2
(A) Crixus.
(B) Varro.
(C) Theokoles.
(D) Barca.

GROUP 3
(A) Bender.
(B) Robby.
(C) Scooter.
(D) Gort.

GROUP 4
(A) Letter.
(B) Tabloid.
(C) Legal.
(D) Ledger.

GROUP 5
(A) Beast.
(B) Colin.
(C) Yellowjacket.
(D) Tom.