So called in Avodah Zarah 24b. Psalms 39, 62 and 77 carry “Jeduthun” in the superscription, but the first two also add le-david; Psalm 77 adds le-‘asaph. The Greek adds “Jeremiah” to Psalm 137, and “Haggai and Zechariah” to Psalms 138, 146, 147:1, 147:12 and 148.