In Assassin's Creed Unity, what is Arno's surname?

The protagonist of Assassin's Creed Unity is Arno Victor Dorian.

Arno is introduced as an orphaned young man raised by François de la Serre, the Grand Master of the French Templar Order. After François is murdered, Arno is drawn into the Assassin Brotherhood while investigating the forces responsible. His personal history links the Assassin and Templar worlds before and during the French Revolution.

“Dorian” is Arno's family surname, while “Victor” is his middle name. The character is commonly referred to simply as Arno, but the full name appears in character descriptions and official franchise material. He is voiced and portrayed in the game as a French Assassin operating in Paris.

Assassin's Creed Unity was designed around Paris and its dense urban architecture. Arno's story should not be confused with that of Shay Cormac, Edward Kenway, or Ezio Auditore, who belong to different periods and games in the series.