His throne name "Sneferka" is attested on the Abydos King List (n. 47) although it is possible that here the name is mistyped, and the O34 hieroglyph ("s") in fact is a R22 ("min"), hence "Neferkamin".
The throne name "Sneferka" is recorded in the Abydos King List (n. 47), but it's possible that there was an error, with the O34 hieroglyph ("s") possibly representing a R22 ("min"), which would mean the name should be "Neferkamin".