Psusennes III was the High Priest of Amun at Thebes

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...

 (976 BC – 943 BC) at the end of the 21st Dynasty

Twenty-first dynasty of Egypt

The Twenty-First, Twenty-Second, Twenty-Third, Twenty-Fourth, and Twenty-Fifth Dynasties of ancient Egypt are often combined under the group title, Third Intermediate Period.-Rulers:...

. Little is known of this individual; he is thought by some to be the same person as (King

King

- Centers of population :* King, Ontario, CanadaIn USA:* King, Indiana* King, North Carolina* King, Lincoln County, Wisconsin* King, Waupaca County, Wisconsin* King County, Washington- Moving-image works :Television:...

) Psusennes II

Psusennes II

Titkheperure or Tyetkheperre Psusennes II Greek Ψουσέννης] or Hor-Pasebakhaenniut II Egyptian ḥr-p3-sb3-ḫˁỉ--nỉwt], was the last king of the Twenty-first dynasty of Egypt. His royal name means "Image of the transformation of Re" in Egyptian. Psusennes II is often considered the same person as...

. His name appears on a document found at the 'mummy cache' DB320

DB320

Tomb DB320 is located next to Deir el-Bahri, in the Theban Necropolis, opposite modern Luxor contained an extraordinary cache of mummified remains and funeral equipment of more than 50 kings, queens, royals and various nobility.-Usage of tomb:The tomb is thought to have initially been the last...

 which describes him as a son of the High Priest Pinedjem II

Pinedjem II

Pinedjem II was a High Priest of Amun at Thebes in Ancient Egypt from 990 BC to 969 BC and was the de facto ruler of the south of the country. He was married to his sister Isetemkheb D and also to his niece Nesikhons, the daughter of his brother Smendes II...

. This makes him a possible candidate for Psusennes II

Psusennes II

Titkheperure or Tyetkheperre Psusennes II Greek Ψουσέννης] or Hor-Pasebakhaenniut II Egyptian ḥr-p3-sb3-ḫˁỉ--nỉwt], was the last king of the Twenty-first dynasty of Egypt. His royal name means "Image of the transformation of Re" in Egyptian. Psusennes II is often considered the same person as...

 because Pinedjem II died in Year 10 of Siamun

Siamun

Neterkheperre or Netjerkheperre-setepenamun Siamun was the sixth pharaoh of Egypt during the Twenty-first dynasty. He built extensively in Lower Egypt for a king of the Third Intermediate Period and is regarded as one of the most powerful rulers of this Dynasty after Psusennes I...

, who was the immediate predecessor of this Pharaoh.