From Middle Egyptian, this feminine singular form was generally used for the plural. In Late Egyptian, the masculine singular form was used with all nouns.
“jm.j-ḫt (lemma ID 25760)”, “jm.j-ḫt (lemma ID 25750)”, and “jm.j-ḫt (lemma ID 25740)”, in Thesaurus Linguae Aegyptiae[1], Corpus issue 18, Web app version 2.1.5, Tonio Sebastian Richter & Daniel A. Werning by order of the Berlin-Brandenburgische Akademie der Wissenschaften and Hans-Werner Fischer-Elfert & Peter Dils by order of the Sächsische Akademie der Wissenschaften zu Leipzig, 2004–26 July 2023