Dr. Remy “Thirteen” Hadley is the full name of the character known by her nickname in House M.D.
Olivia Wilde played Thirteen, who joins House’s diagnostic team after competing in a selection process for new fellows. House calls her “Thirteen” because she initially appears as candidate number thirteen during that process, and the nickname remains attached to her.
Hadley is a physician with a strong personal connection to Huntington’s disease: she learns that she carries the gene for the inherited condition. That storyline becomes one of the character’s defining arcs and influences her relationships, medical decisions, and outlook on the future.
“Thirteen” is not her surname, and Remy is not a nickname for Hadley. The character’s given name is Remy, her family name is Hadley, and the number comes from the fellowship competition rather than from a medical specialty or jersey number.