I Chronicles 7:38 Kabbalah

וּבְנֵ֖י יֶ֑תֶר יְפֻנֶּ֥ה וּפִסְפָּ֖ה וַאְרָֽא׃

And the sons of Jether: Jephunneh, and Pispa, and Ara.

Read kabbalistic (mystical) interpretation of I Chronicles 7:38: and classical mystical sources.