That's a good effort. Alas, it's not the truth. Circular boiled-and-baked bread rolls (such as ka'ak, obwarzanek, taralli, and simit) have a long and diverse history across Europe and western Asia. Ka'ak, another early boiled-then-baked ring-shaped bread, is referenced in the 10th century Arabic cookbook Kitab al Tabikh and is described in the 13th century Arabic cookbook Kitab al Wusla ila al Habib. As regards Europe the bagel may have been brought to Kraków by Bona Sforza, a woman from Bari, Italy, who became the Queen of Poland and Grand Duchess of Lithuania as the second wife of Sigismund the Old from 1518 to 1548. There is some evidence that the bagel may have been derived from pretzels made in Germany brought by immigrants to Poland. It's of course impossible that the Poles originated the Bagel, as the Poles' word for Bagel derives from Yiddish. However, the Yiddish word for Bagel derives from the German dialect word beugel, meaning "ring" or "bracelet" in Bavarian. https://en.wikipedia.org/wiki/Bagel It is clear what happened, German or Austrian (parts of Poland were Austrian a while ago) migrants brought the Pretzel technique to Poland where it became the Bagel.
