וּבְנֵי֙ כָּלֵ֣ב בֶּן־יְפֻנֶּ֔ה עִ֥ירוּ אֵלָ֖ה וָנָ֑עַם וּבְנֵ֥י אֵלָ֖ה וּקְנַֽז׃
And the sons of Caleb the son of Jephunneh: Iru, Elah, and Naam; and the sons of Elah: Kenaz.
Read kabbalistic (mystical) interpretation of I Chronicles 4:15: and classical mystical sources.