Ephrathites, such as David both from Ephraim as Yehudah? Looking at the words Ephrathite and Ephraimite (אפרתי) they have the exact same spelling From the website doitinhebrew com the dictionary even said: ‘Ephraimite; inhabitant of Ephrat(ah) ’ This reminded me of Beit Lechem the homeground or ancestral home of both Elimelech and Naomi, who are called Ephratites in the book of Ruth (1:2)
sources mekorot - What was Jeroboams lineage? - Mi Yodeya Stack Exchange Network Stack Exchange network consists of 183 Q A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers
What is written about Messiah ben Calev? - Mi Yodeya And it is written: “David was the son of that Ephrathite of Bethlehem in Judah” (I Samuel 17:12) Therefore, he was a descendant of Miriam So, the Gemara refers to Miriam under many names, likely because during her marriage she changed How exactly David is the descendand of Miriam - that is a good but separate question here and here