Commentary for II Samuel 4:2

וּשְׁנֵ֣י אֲנָשִׁ֣ים שָׂרֵֽי־גְדוּדִ֣ים הָי֪וּ בֶן־שָׁא֟וּל שֵׁם֩ הָאֶחָ֨ד בַּֽעֲנָ֜ה וְשֵׁ֧ם הַשֵּׁנִ֣י רֵכָ֗ב בְּנֵ֛י רִמּ֥וֹן הַבְּאֶֽרֹתִ֖י מִבְּנֵ֣י בִנְיָמִ֑ן כִּ֚י גַּם־בְּאֵר֔וֹת תֵּחָשֵׁ֖ב עַל־בִּנְיָמִֽן׃

And Saul’s son had two men that were captains of bands; the name of the one was Baanah, and the name of the other Rechab, the sons of Rimmon the Beerothite, of the children of Benjamin; for Beeroth also is reckoned to Benjamin;

Rashi on II Samuel