It has also been argued based on contextual evidence and transliterations on cuneiform learning tablets, that the earliest, Sumerian form of the name was at least sometimes also pronounced Zu, and that Anzu is primarily the Akkadian form of the name. However, there is evidence for both readings of the name in both languages, and the issue is confused further by the fact that the prefix 𒀭 (AN) was often used to distinguish deities or even simply high places. AN.ZU could therefore mean simply "heavenly eagle".[2]