Rorimac (Rory) Brandybuck was one of the 144 guests invited to Bilbo's farewell dinner party, and one of the only ones who suspected that Bilbo was off on another adventure rather than playing a mere prank.

Rory was the son of Gorbadoc Brandybuck and from his father he inherited the title of Master of Buckland. At the time of Bilbo's party he was nearly 100 years old. After his death, the title passed to his son Saradoc Brandybuck, and later to his grandson, Meriadoc Brandybuck who was better known as Merry of the Fellowship of the Ring.

Bilbo left him twelve bottles of Old Winyards upon leaving Bag End.
Encyclopedia entry originally written by ~Mirimë~