Analysis of information sources in references of the Wikipedia article "Εστέρκα" in Greek language version.
1370. Casimir, the king of Poland, took for himself a concubine - a young Jewess named Esther. Of all the maidens of the land, none compared to her beauty. She was his wife for many years. For her sake, the king extended many privileges to the Jews of his kingdom. She persuaded the king to issue documents of freedom and beneficence.
Estera was a Jewess; she had to be beautiful..
Kazimierz chował miłośnicę z Czech Rokiczankę, która była niepospolitej cudowności, ale nią potem wzgardził, a Esterkę Żydówkę na jej miejsce wziął
The earliest written version of the Esterke legend by a Jewish author appears in David Gans's sixteenth-century chronicle, Tsemaḥ David. Gans wrote that Casimir, King of Poland, took as his concubine a Jewish girl named Esther, a maiden whose beauty was unparalleled in the entire country, and she was his wife for many years. The King performed great favors for the Jews for her sake, and she extracted from the king writs of kindness and liberty for the Jews.
