They're called the Second Sons.
Game of Thrones Season 3, Episode 8
The SECOND we tell him
Westworld Season 2, Episode 4
Do we have a SECOND?
The Big Bang Theory Season 9, Episode 21
THE SECOND IN CHARGE
OF THE HEIST CRISIS
Money Heist Season 1, Episode 13
Hang on a SECOND.
That's not our answer.
The Big Bang Theory Season 1, Episode 13