Where does “diβi-vān” come from?

diβi-vān (Middle Persian) comes from Middle Persian dipi-vān-, from Old Persian dipi-vahanam, from Old Persian 𐎮𐎡𐎱𐎡, from Elamite 𒁾, from Akkadian 𒁾, from Sumerian 𒁾 — tablet; cylinder seal, sealed tablet.