No king lists record this pharaoh, and only a few artifacts attest to his existence at all. However, this was obviously a time of upheaval in Egypt, and he may have been a regional king or forgotten because he had a short reign or an insignificant one.

Only two things ever show his name: a fragment of stone found in the debris of King Djoser's step pyramid and  a stone vessel found under the pyarmid with a serekh containing his name. His name is not listed in any king lists.

Most chronolgoies do not include Sneferka at all.

pharaohs

Menes
Djer
Merneith
Djet
Den
Anedjib
Semerkhet
Qa'a
Sneferka