Lista Real de Abidos
The prenomen "Netjerkare" is inscribed on the 40th entry of the Abydos King List, a king list redacted during the reign of Seti I. Netjerkare immediately follows Merenre Nemtyemsaf II on the list. The prenomen Netjerkare is also attested on a single copper tool of unknown provenance and now in the British Museum. The nomen "Neitiqerty Siptah" is inscribed on the Turin canon, on the 5th column, 7th row (4th column, 7th row in Gardiner's reconstruction of the canon).