Eldest

The eldest child in a family, or individual in a group.

(of a player) Receiving cards from the dealer first, before any other players.

(of a hand) Having higher, or superior cards.

Of an object, concept, relationship, etc., having existed for a relatively long period of time.

"an old abandoned building;  an old friend"

Having been used and thus no longer new or unused.

"I find that an old toothbrush is good to clean the keyboard with."

Having existed or lived for the specified time.

"How old are they? She’s five years old and he's seven. We also have a young teen and a two-year-old child."

(heading) Of an earlier time.