Where does “𒀀𒈠𒊒” come from?

𒀀𒈠𒊒 (Akkadian) comes from Sumerian 𒀀𒈠𒊒, from Akkadian 𒀀 — water; heir.

Ancestry of “𒀀𒈠𒊒”, step by step

Step	Language	Word	Meaning
1	Sumerian	𒀀𒈠𒊒	devastating flood, the mythical Deluge
2	Akkadian	𒀀	water; heir