Hector was one of the most famous characters in Greek mythology, known for being a prince of Troy and a great warrior. He was the son of King Priam and Queen Hecuba, and was also the husband of Andromache and the father of Astyanax. He was a major character in Homer's Iliad, where he was portrayed as a brave and noble warrior who fought against the Greeks during the Trojan War. The term 'Hector was one' is a reference to his role in the war, and the crossword solution 'Trojan' refers to his city of origin.