Shay's surname in Assassin's Creed Rogue is Cormac.
Shay Patrick Cormac is the protagonist of Assassin's Creed Rogue, released in 2014. The story begins with Shay as an Assassin during the Seven Years' War, then follows his break with the Brotherhood and his alliance with the Templars. This change of allegiance gives the game its distinctive perspective within the series.
Rogue connects directly to earlier and later stories. It features characters associated with Assassin's Creed III and Assassin's Creed IV: Black Flag, while its conclusion leads into the background of Assassin's Creed Unity. Shay is sometimes confused with Edward Kenway, the protagonist of Black Flag, or Arno Dorian, the protagonist of Unity, but those characters belong to different games and have different family histories.