What is a successful bidder in bridge called?

Answer 1

The successful bidder in bridge is called the declarer.

The declarer's partner will be the dummy.

The other two players will be the defenders.

Answer 2

A Contract Bridge auction ends when three consecutive players pass. The partnership that has won the auction are referred to as declarer, and the opposing partnership are defenders.
Once the opening lead is made, the dummy hand of the declaring partnership is tabled face up, and both it and the remaining concealed hand are played by a single member of the declaring partnership. The term Declarer typically refers to the playing individual, not the dummy or the partnership.

Answer 3

Modern bridge is called Contract Bridge. The players bid for the right to name the trump suit and make a contract as to how many tricks they are going to make.