[3][4] Jürgen von Beckerath, Dietrich Wildung and Peter Kaplony proposed that "Sa" is a short form of the Horus-name Sanakht.

Consequently, Kaplony equated Horus Sa with njswt-bity Wr-Za-Khnwm, "The king of Upper and Lower Egypt, Wersakhnum" and credited him a reign of 2 months and 23 days during the interregnum between Khasekhemwy and Djoser.

[9] However, Kaplony's hypothesis has been undermined by the discovery of clay seals of Djoser in Khasekhemwy's tomb, indicating that the former immediately succeeded and buried the latter.

[10] Horus Sa could instead be the Horus-name of Senedj or another 2nd dynasty king, ruling in Memphis during the troubled period following the reign of Nynetjer.

[11] However, Egyptologists such as Jean-Philippe Lauer, Pierre Lacau and Ilona Regulski call for caution of the correct reading of the inscriptions.