While the High Priest of Amun Piankh (or Payankh) has been assumed to be a son-in-law of Herihor

Herihor

Herihor was an Egyptian army officer and High Priest of Amun at Thebes during the reign of Pharaoh Ramesses XI although Karl Jansen Winkeln has argued that Piankh preceded Herihor as High Priest at Thebes and that Herihor outlived Ramesses XI before being succeeded in this office by Pinedjem I,...

 and his heir to the Theban

Thebes, Egypt

Thebes is the Greek name for a city in Ancient Egypt located about 800 km south of the Mediterranean, on the east bank of the river Nile within the modern city of Luxor. The Theban Necropolis is situated nearby on the west bank of the Nile.-History:...

 throne of the High Priest of Amun

High Priests of Amun at Thebes

While not regarded as a dynasty, the High Priests of Amun at Thebes were nevertheless of such power and influence that they were effectively the rulers of Upper Egypt from 1080 to c.943 BC, after this period their influence declined...

, recent studies by Karl Jansen-Winkeln of the surviving temple inscriptions and monumental works by Herihor and Piankh in Upper Egypt imply that Piankh was actually Herihor's predecessor and father in-law. Piankh’s wife was Hrere, Herihor

Herihor

Herihor was an Egyptian army officer and High Priest of Amun at Thebes during the reign of Pharaoh Ramesses XI although Karl Jansen Winkeln has argued that Piankh preceded Herihor as High Priest at Thebes and that Herihor outlived Ramesses XI before being succeeded in this office by Pinedjem I,...

's daughter, while his son was Pinedjem I

Pinedjem I

Pinedjem I was the High Priest of Amun at Thebes in Ancient Egypt from 1070 BC to 1032 BC and the de facto ruler of the south of the country from 1054 BC. He was the son of the High Priest Piankh. However, many Egyptologists today believe that the succession in the Amun priesthood actually ran from...

. Piankh led an army against Pinehesy

Pinehesy

Pinehesy, Panehesy or Panehasy, depending on different transliteration was Viceroy of Kush during the reign of Ramesses XI, the last king of the Egyptian 20th Dynasty....

, viceroy of Kush, who had conquered large parts of Upper Egypt

Upper Egypt

Upper Egypt is the strip of land, on both sides of the Nile valley, that extends from the cataract boundaries of modern-day Aswan north to the area between El-Ayait and Zawyet Dahshur . The northern section of Upper Egypt, between El-Ayait and Sohag is sometimes known as Middle Egypt...

and succeeded in driving him back into Nubia .
Piankh's name literally means "of life".

Piankh held a number of official positions including High Priest of Amun, King's scribe, King's son of Kush, Overseer of the foreign countries to the South, overseer of the granaries and commander of the archers (i. e. chief of police) of the whole of [Upper] Egypt.. He was succeeded in office by either Herihor or Pinedjem I, his son.