Adelbert Steiner (アデルバート・スタイナー Aderubāto Sutainā) is the Captain of the Knights of Pluto, the only group of male soldiers in Alexandria's entire military force. Steiner usually has a massive frown to go with a grouchy disposition. Steiner is unusual amongst Final Fantasy characters, in that while the game allows the player to choose his name, the name the player chooses becomes his surname instead of his first name. For instance, if the player entered the name "Steve," the character would be called "Captain Adelbert Steve." This also makes him one of the few Final Fantasy characters to be called by both the first and last name given in the game's manual during actual gameplay.
Source: Wikipedia, "Garnet Til Alexandros XVII", available under the CC-BY-SA License.