Where does “[[rmt]] [[jw]][[.f]]” come from?

[[rmt]] [[jw]][[.f]] (Demotic) comes from Egyptian [[rmṯ]] [[jw]][[.f]].

Ancestry of “[[rmt]] [[jw]][[.f]]”, step by step

Step	Language	Word	Meaning
1	Egyptian	[[rmṯ]] [[jw]][[.f]]	—

[[rmt]] [[jw]][[.f]] — Etymology, Origin & Word History | Etymology Explorer