Jack's father, Keeper of the Pirate Code.
Teague is Jack's father and an authority on pirate law.
The character profile identifies Captain Teague as Jack's father, and the plot identifies him as the Keeper of the Pirate Code.
His interpretation of the Code shapes Elizabeth's authority.
Teague informs the Brethren Court that only an elected Pirate King can declare war, enabling the vote that makes Elizabeth King.
Explore the full interactive character relationship map of Pirates of the Caribbean: At World's End
Related entry on Wikidata (Q1317406), public domain (CC0).