Example: L.L. Zamenhof (Zamenhof Hotel: where Landsman lives and Shpilman was killed).
From wikipedia:
Zamenhof was born on December 15, 1859 in the town of Białystok (now in Poland, then part of the Russian Empire) to parents of Lithuanian Jewish descent. He considered his native language to be his father's Russian (or perhaps Belarusian, which was not considered distinct from Russian at the time and which appears to have had a strong influence on Esperanto phonology), though he also spoke his mother's Yiddish; as he grew older, he spoke more Polish, and that became the native language of his children.[1] His father was a German teacher, and he also spoke that fluently. Later he learned French, Latin, Greek, Hebrew and English, and had an interest in Italian, Spanish and Lithuanian.
In addition to the Yiddish-speaking Jewish majority, the population of Białystok was made up of three other ethnic groups: Poles, Germans, and Belarusians. Zamenhof was saddened and frustrated by the many quarrels between these groups. He supposed that the main reason for the hate and prejudice lay in mutual misunderstanding, caused by the lack of one common language that would play the role of a neutral communication tool between people of different ethnic and linguistic backgrounds.
Others I found were the founder of the World Zionist Union, and Janusz Korczak, the pen name of Henryk Goldszmit (July 22, 1877 – August 1942) was a Polish-Jewish children's author, pediatrician, and child pedagogue, known as Pan Doktor (Mr Doctor).
