|Book(s)|| A Storm of Swords (appears)|
A Dance with Dragons (mentioned)
Ralph Buckler is Lord of Bronzegate, head of House Buckler, originally sworn to Storm's End, now sworn to the Iron Throne. His cousin is Ser Brus Buckler, a knight sworn to King Stannis I, being one of the Queen's men.
A Storm of Swords
Lord Buckler hosted Prince Oberyn Martell and his entourage when they are on their way to King's Landing for Joffrey' s wedding. Lord Buckler was a guest on Joffrey I's wedding himself as well, where he proposed a toast.