Ralph Buckler is Lord of Bronzegate and the head of House Buckler. His cousin is Ser Brus Buckler.
Lord Buckler hosts Prince Oberyn Martell and his entourage when they are on their way to King's Landing for the wedding of King Joffrey I Baratheon and Margaery Tyrell.
Ralph offers a toast to the royal couple during the wedding feast at the Red Keep. However, Joffrey is poisoned moments later.