TV series example of the word

Breaking Bad Season 2, Episode 4
You've decided to, oh, I don't know, make your eldest son homeless?

Breaking Bad Season 2, Episode 12
led by the eldest female in the herd.

Game of Thrones Season 4, Episode 8
eldest daughter of Lord Eddard Stark.

Game of Thrones Season 1, Episode 8
Little dove, you must write to Lady Catelyn and your brother, the eldest,

Game of Thrones Season 5, Episode 7
I'm Lord Bolton's eldest son.