20 22nd century BC in Egypt

The 4.2-kiloyear BP aridification event was one of the most severe climatic events of the Holocene epoch. It defines the beginning of the current Meghalayan age in the Holocene epoch.

The Sixth Dynasty of ancient Egypt along with the Third, Fourth and Fifth Dynasty constitute the Old Kingdom of Dynastic Egypt.

The Ninth Dynasty of ancient Egypt is often combined with the 7th, 8th, 10th and early 11th Dynasties under the group title First Intermediate Period. The dynasty that seems to have supplanted the 8th Dynasty is extremely obscure. The takeover by the rulers of Herakleopolis was violent and is reflected in Manetho's description of Achthoes, the founder of the dynasty, as 'more terrible than his predecessors', who 'wrought evil things for those in all Egypt".

Heracleopolis Magna or Heracleopolis, is the Roman name of the capital of the 20th nome of ancient Upper Egypt, known in Ancient Egyptian as Het-Nesut. The site is located approximately 15 km (9.3 mi) west of the modern city of Beni Suef, in the Beni Suef Governorate of Egypt.

Meryibre Khety, also known by his Horus name Meryibtawy, was a pharaoh of the 9th or 10th Dynasty of Egypt, during the First Intermediate Period.

Menkare was an ancient Egyptian pharaoh, the first or second ruler of the Eighth Dynasty. Menkare probably reigned a short time at the transition between the Old Kingdom period and the First Intermediate Period, in the early 22nd century BC. The rapid succession of brief reigns at the time suggests times of hardship, possibly related to a widespread aridification of the Middle East, known as the 4.2 kiloyear event. As a pharaoh of the Eighth Dynasty, according to Manetho, Menkare's seat of power would have been Memphis.

Merenre Nemtyemsaf II was an ancient Egyptian pharaoh, the sixth and penultimate ruler of the 6th Dynasty. He reigned for 1 year and 1 month in the first half of the 22nd century BC, at the very end of the Old Kingdom period. Nemtyemsaf II likely ascended the throne as an old man, succeeding his long-lived father Pepi II Neferkare at a time when the power of the pharaoh was crumbling.

Meryhathor or Meryt-Hathor, was a pharaoh of the 10th Dynasty of Egypt, during the First Intermediate Period.

Nebkaure Khety was an ancient Egyptian pharaoh of the 9th or 10th Dynasty, during the First Intermediate Period.

Neferirkare was an ancient Egyptian pharaoh of the Eighth Dynasty during the early First Intermediate Period. According to the egyptologists Kim Ryholt, Jürgen von Beckerath and Darrell Baker he was the 17th and final king of the Eighth Dynasty. Many scholars consider Neferirkare to have been the last pharaoh of the Old Kingdom, which came to an end with the 8th Dynasty.

Neferkahor was an ancient Egyptian pharaoh of the Eighth Dynasty during the First Intermediate Period. According to Egyptologists Jürgen von Beckerath and Darrell Baker, he was the eleventh king of this dynasty. His name is attested on the Abydos King List and on a black steatite cylinder seal of unknown provenance. His name is absent from the Turin King List, a lacuna affecting the 7th/8th dynasty where his name would have been listed.

Neferkamin Anu was a pharaoh of ancient Egypt during the First Intermediate Period. According to the Abydos King List and the latest reconstruction of the Turin canon by Kim Ryholt, he was the 13th king of the Eighth Dynasty. This opinion is shared by the Egyptologists Jürgen von Beckerath, Thomas Schneider and Darrell Baker. As a pharaoh of the Eighth Dynasty, Neferkamin Anu would have reigned over the Memphite region.

Neferkare II was an ancient Egyptian pharaoh of the Eighth Dynasty during the early First Intermediate Period. According to the Egyptologists Kim Ryholt, Jürgen von Beckerath and Darell Baker he was the third king of the Eighth Dynasty. As a pharaoh of the Eighth Dynasty, Neferkare II's capital would have been Memphis.

Neferkare Neby was an ancient Egyptian pharaoh of the Eighth Dynasty during the early First Intermediate Period. According to Egyptologists Jürgen von Beckerath and Darrell Baker, he was the fourth king of the Seventh dynasty, as he appears as the fourth king in the Abydos King List within the list of kings assigned to this dynasty.

Neferkare Pepiseneb was an ancient Egyptian pharaoh of the Eighth Dynasty during the early First Intermediate Period. According to the Egyptologists Kim Ryholt, Jürgen von Beckerath and Darrell Baker he was the twelfth king of the combined Eighth Dynasty.

Neferkauhor Khuwihapi was an ancient Egyptian pharaoh of the Eighth Dynasty during the early First Intermediate Period, at a time when Egypt was possibly divided between several polities. Neferkauhor was the sixteenth and penultimate king of the Eighth Dynasty and as such would have ruled over the Memphite region. Neferkauhor reigned for little over 2 years and is one of the best attested kings of this period with eight of his decrees surviving in fragmentary condition to this day.

Neferkaure was a pharaoh of ancient Egypt during the First Intermediate Period. According to the Abydos King List and the latest reconstruction of the Turin canon by Kim Ryholt, he was the 15th king of the Eighth Dynasty. This opinion is shared by the Egyptologists Jürgen von Beckerath, Thomas Schneider and Darell Baker. As a pharaoh of the Eighth Dynasty, Neferkaure's seat of power was Memphis and he may not have held power over all of Egypt.

Netjerkare Siptah was an ancient Egyptian pharaoh, the seventh and last ruler of the Sixth Dynasty. Alternatively some scholars classify him as the first king of the Seventh or Eighth Dynasty. As the last king of the 6th Dynasty, Netjerkare Siptah is considered by some Egyptologists to be the last king of the Old Kingdom period.

Qakare Ibi was an ancient Egyptian pharaoh during the early First Intermediate Period and the 14th ruler of the Eighth Dynasty. As such Qakare Ibi's seat of power was Memphis and he probably did not hold power over all of Egypt. Qakare Ibi is one of the best attested pharaohs of the Eighth Dynasty due to the discovery of his small pyramid in South Saqqara.

Djedkare Shemai may have been an ancient Egyptian pharaoh during the Eighth Dynasty of the First Intermediate Period. His name is only attested on the Abydos King List, no contemporary document or building with his name has been found.