Where does “psḏt pḏt” come from?

psḏt pḏt (Egyptian) comes from Egyptian psḏt, from Egyptian psḏw — nine.

Ancestry of “psḏt pḏt”, step by step

Step	Language	Word	Meaning
1	Egyptian	psḏt	feminine of psḏw; nineness, ennead
2	Egyptian	psḏw	nine

psḏt pḏt — Etymology, Origin & Word History | Etymology Explorer