[2] The possibly only known contemporary inscription from Senedj's reign was found in 1909 by Egyptologist Uvo Hölscher, who assisted the excavations at the Khephren- and Menkaura temple at Giza.

The name, written in a cartouche, appears in the inscription on a false door belonging to the mastaba tomb of the high priest Shery at Saqqara.

[6][7] Egyptologist Dietrich Wildung points to two further priests and possible relatives of Shery, who both also participated the funerary cult of Senedj, Inkef and Siy.

[9] The latest mention of Senedj's name appears on a small bronze statuette in the shape of a kneeling king wearing the White Crown of Upper Egypt and holding incense burners in its hands.

[10][11] Egyptologist Peter Munro has written a report about the existence of a mud seal inscription showing the cartouche name Nefer-senedj-Ra, which he thinks to be a version of “Senedj”.

[17] Egyptologists such as Wolfgang Helck, Nicolas Grimal, Hermann Alexander Schlögl and Francesco Tiradritti believe that king Nynetjer, the third ruler of 2nd dynasty, left a realm that was suffering from an overly complex state administration and that Nynetjer decided to split Egypt to leave it to his two sons (or, at least, two chosen successors) who would rule two separate kingdoms, in the hope that the two rulers could better administer the states.

Bell points to the inscriptions of the Palermo stone, where, in her opinion, the records of the annual Nile floods show constantly low levels during this period.

Bell had overlooked that the heights of the Nile floods in the Palermo stone inscription only takes into account the measurements of the nilometers around Memphis, but not elsewhere along the river.

Wilkinson thinks that one of the Great Southern Galleries within the Necropolis of King Djoser (3rd Dynasty) was originally Senedj's tomb.