Midrash su I Re 11:26

“The name of the man was Elimelekh, and the name of his wife Naomi, and the names of his two sons Maḥlon and Kilyon, Ephratites of Bethlehem in Judah. They came to the fields of Moav, and were there” (Ruth 1:2).
“The name of the man was Elimelekh” (Ruth 1:2). Rabbi Meir would expound names. Rabbi Yehoshua ben Korḥa would expound names. “The name of the man was Elimelekh,” as he would say: To me [elai], the kingdom [malkhut] will come. “And the name of his wife was Naomi,” as her actions were fine [na’im], and pleasant [ne’imim]. “And the names of his two sons Maḥlon and Kilyon” – Maḥlon, for they were eradicated [nimḥu] from the world; Kilyon, for they were eliminated [kalu] from the world. “Ephratites,”⁸³An expression of greatness. Rabbi Yehoshua ben Levi says: He was a resident of the palace. Rabbi bar Rabbi Neḥemya says: He was a nobleman. Another matter, “Ephratites,” Rabbi Pinḥas said: The entire crown with which Ephraim was crowned by Jacob at the moment that he passed from the world. He said to him: ‘Ephraim, tribal heads, heads of the yeshiva; the most excellent and outstanding of my children will be called by your name.’ “Son of Toḥu, son of Tzuf, Ephratite” (I Samuel 1:1);⁸⁴This verse is referring to Elkana. Ephratite means from Ephraim. “Yorovam ben Nevat Ephratite” (I Kings 11:26); David, son of an Ephratite man” (I Samuel 17:12); “Maḥlon and Kilyon, Ephratites.”

"Gilead is mine," refers to Ahab, king of Israel, who died in Ramoth-Gilead; "and Manasseh is mine," is to be taken literally; "Ephraim is the defence of mine head," refers to Jeroboam; "Judah || is my sceptre," points to Ahithophel; "Moab is my washpot" (Ps. 60:8), means Gehazi; "upon Edom will I cast my shoe" (ibid.), refers to Doeg; "Philistia, shout thou because of me" (ibid.). The Holy One, blessed be He, said: It is for Me to search for merit on their behalf, and to make them friendly towards one another.

They betook themselves to the one who carried out the words of Moses, (to) Aaron his brother, and Hur, the son of his sister. Whence (do we know) that Hur was the son of (Moses') sister? Because it is said, "And Caleb took unto him Ephrath, which bare him Hur" (1 Chron. 2:19). Why was Miriam's name called Ephrath? Because she was a daughter of the palace, a daughter of kings, one of the magnates of the generation; for every prince and great man who arose in Israel had his name called an Ephrathite, as it is said, "And Jeroboam, the son of Nebat, an Ephrathite" (1 Kings 11:26); and it says, "And David was the son of that Ephrathite" (1 Sam. 17:12). Was he then an Ephrathite? Was he not of the tribe of Judah? But he was a nobleman, a son of kings, one of the magnates of the generation. But since Hur was of the tribe of Judah, and one of the magnates of the generation, he began to reprove Israel with harsh words, and the plunderers who were in Israel arose against him, and slew him.