Wladimir, I don't know Greek, I only know some of the scribal conventions and I can only read simple things like names (so someone can correct me if I am wrong), but I believe the letter you circled in red is hori.
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And you probably already know that the shape that looks like EVA-s often stands for eius in Latin (e + tail).
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And you probably already know that the shape that looks like EVA-s often stands for eius in Latin (e + tail).

