Now Adonijah, the son of Haggith, exalted himself, saying, “I will be king.” Then he prepared chariots and horsemen for himself, and 50 men to run before him. Bible

“Adonijah, the son of Haggith.” This formula, “person, the son of someone,” usually designates the son and who is their father, but David was Adonijah’s father; Haggith was his mother. David had a number of wives, and their children became rivals.

Commentary for: 1 Kings 1:5