His Horus name is recorded in three wadi of the Sinai peninsula (Wadi Abu Madawi, Wadi Abu Koua, and Wadi Ameyra) following a very old route used by expeditions seeking copper and turquoise.
Nebra's name appears on several stone vessels, mostly made of schist, alabaster and marble. Most of the bowls were found at Abydos, Giza and Saqqara. The inscriptions contain depictions of cultic buildings such as the Ka-house, depictions of deities such as Bastet, Neith and Seth and also the mentionings of cultic feasts. All found objects present Nebra's name either together with that of his predecessor Hotepsekhemwy or with his successor Nynetjer.
Clay seal impressions with Nebra's name were found beneath the causeway of the Pyramid of Unas at Saqqara and inside a large gallery tomb, also at Saqqara. This tomb also yielded several seal impressions with Hotepsekhemwy's name and for this reason it is debated whether the tomb belongs to Nebra or his predecessor Hotepsekhemwy.
Egyptologist Jochem Kahl says that Nebra was the same person as the mysterious king Weneg-Nebti. He points to a vessel fragment made of volcanic ash, which was found in the tomb of king Peribsen (a later ruler during the 2nd dynasty) at Abydos. On the pot sherd he believes there are traces of the weneg-flower beneath the incised name of king Ninetjer. To the right of Ninetjer's name the depiction of the Ka-house of king Nebra is partially preserved. This arrangement led Kahl to conclude that the weneg-flower and Nebra's name were connected to each other and king Ninetjer replaced the inscription. Kahl also points out that king Ninetjer wrote his name mirrored, so that his name deliberately runs in the opposite direction to Nebra's name.
The wife of Nebra is unknown.
While Manetho, a historian from the Ptolemaic period, suggested a 39-year reign, scholars argue this figure might result from misinterpretation or exaggeration. Modern Egyptologists estimate a significantly shorter reign, ranging between 10 and 14 years.
Histocrat/wiki/AncientEgyptOnline