av 42
It can be many things, like a mistake by Av. , a form of abbreviation "Audio/Video", or "atrioventricular" , also a Spanishized variant of the old month ab. For the case of the current eleventh Hebrew month, this spelling with 'v' is more common, and Av comes from Akkadian 1488; 1464; 1489; ( abu "recos") .
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