Wikipedia
Seth-Peribsen (also known as Ash-Peribsen, Peribsen and Perabsen) is the serekh name of an early Egyptian monarch ( pharaoh), who ruled during the Second Dynasty of Egypt (c. 2890 – c. 2686 BC). His chronological position within this dynasty is unknown and it is disputed who ruled both before and after him. The duration of his reign is also unknown.
Peribsen's royal name is a subject of curiosity for Egyptologists because it is connected to the deity Seth rather than Horus, as was traditional for the name of a pharaoh. The debate continues over why Peribsen chose this name. Earlier theories have favoured the idea that Egypt was split in two realms during Peribsen's time or that he was a heretic, who sought to start a new monotheistic religion with Seth as the only worshipped god. However, newer evidence and evaluations tend to show that the Egyptian kingdom was unified, but witnessed a vast and profound reform during the second dynasty. Seal impressions from tombs of this era reveal great changes in the titles held by high officials, pointing to a reduction of their power. Further seal impressions show that several deities were worshipped under Peribsen, refuting the monotheism theory, with other contemporary inscriptions indicating that the Egyptian grammar was perfected during his reign: In particular, the earliest seal impressions with complete sentences date back to Peribsen's reign. Thus, Peribsen's reign was in fact a time of cultural and religious advancement.
Existing negative views about Peribsen's existence are based on Ramesside king lists, such as the Abydos King List, the Saqqara King List and the Royal Canon of Turin, which all omit Peribsen's name. These, however, are known to have been redacted nearly 1500 years after his death and several 4th dynasty tombs of priests performing the funerary cult for Peribsen have been uncovered. These tombs report Peribsen's name correctly and their existence demonstrate that Peribsen was seen as a legitimate pharaoh, not subject to damnatio memoriae as Akhenaten later would be. Historians and Egyptologists therefore consider the possibility that Peribsen's name was actually forgotten in time or that his name was preserved in a distorted, misspelled form.
Peribsen's Tomb was discovered in 1898 at Abydos. It was well preserved and showed traces of restoration undertaken during later dynastic periods.