Hodor
Hodor has brown hair and a brown beard and is the great-grandson of Old Nan, the oldest woman in the castle. When Bran tells Nan that the only thing Hodor is sure of is his own name, Nan laughs as Hodor's real name is actually Walder: "Hodor" is the only word he seems capable of speaking, and has become his name. The meaning of the word is revealed in the TV series