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nṯr ꜥꜣ with the horizontal arrangement of ꜥꜣ

The horizontal arrangement of the sign ꜥꜣ in the phrase nṯr ꜥꜣ "great god" becomes common under the 12th Dynasty, although occasional earlier examples are known.

12th - 13th Dyn.
Brovarski 2009, 383; Schenkel 1962, 30; Selim 2001b, 325 n. b