Akkadian language
The commonness of cuneiform "na", in the top 25 used signs by Buccellati (Buccellati 1979), (2nd highest usage, exceeded by a: "a (cuneiform)") is because of usage for the spelling of "a-na" (Akkadian language "ana") -, the common preposition spelling for English language: "to, for, by, of, at, etc.". It is also a component for the Akkadian language preposition: "i-na" ("ina"), meaning: "in, into, by, etc.".