A heraldic creature combining features of a dragon and a stag, with a winged body and antlers.
From heraldic terminology, possibly combining 'bag' (archaic for dragon) with 'wynn' or 'wyn' (Old English rune name). Medieval heraldry invented countless composite creatures.
Medieval heralds basically made up whatever creatures they wanted—the bagwyn shows how heraldry was pure fantasy with a rule book, letting aristocrats claim kinship with impossible beasts.
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