I Chronicles 24:15 Midrash

לְחֵזִיר֙ שִׁבְעָ֣ה עָשָׂ֔ר לְהַפִּצֵּ֖ץ שְׁמוֹנָ֥ה עָשָֽׂר׃

the seventeenth to Hezir, the eighteenth to Happizzez;

Read midrashic interpretation of I Chronicles 24:15: and classical rabbinic exegesis.