After tracing his family roots to Gora Kalwaria, Poland, and erecting a memorial stone in honor of them and the entire Jewish community that was wiped out in the Holocaust, Avner Yonai still felt incomplete.
....During his research, Mr. Yonai discovered that in the 1920s and '30s. his maternal grandfather, David Rybak, and two of his brothers played in a band -- the 11-piece Ger Mandolin Orchestra, Ger being the Yiddish name for Gora Kalwaria. Most of the musicians died in the Treblinka death camp, but not David; he left Poland for British-mandate Palestine in 1935, before World War II.
Mr. Yonai set about reconstructing that orchestra,...
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