One of the most important of these people was the High Priest of Amun Shoshenq C, son of Osorkon I, who served in office during his father's reign at Thebes.
Each faction had a rival line of High Priests of Amun with Pedubast's being Harsiese B who is attested in office as early as Year 6 of Shoshenq III and then Takelot E who appears in office from Year 23 of Pedubast I. Osorkon B was Pedubast I and Harsiese's chief rival.
Kenneth Kitchen, in his latest 1996 edition of '’The Third Intermediate Period in Egypt (c.1100–650 BC)’', maintains that Shoshenq II was the High Priest of Amun Shoshenq C, son of Osorkon I and Queen Maatkare, who was appointed as the junior coregent to the throne but predeceased his father.
Harsiese A, as the son of the High Priest Shoshenq C and grandson of Osorkon I, or a hypothethical king named Maatkheperre Shoshenq must have appeared as a rival.