Solomon Mattusewich Epstein,m. Rosa Klompus

Solomon M. Epstein married Rosa Klompus,dau. of Samuel and Sandra Shende Klompus, in Latvia—perhaps Libau, where the Klompuses lived. The date is unknown, perhaps late 1890's, give or take 10 years. They had Bernard Gabriel and Shielomit Epstein. In the 1920's they gave at least Rosa's passport to her niece, Rosa Klompus, and her husband,Max Rosenblatt who arrived in Springfield,MA USA in the latter 1920's and used the name Epstein from then on; named their first child Bernard Gabriel. Am trying to find out more about any of these people,Esp.Max Rosenblatt from Kaunas? and the Epstein family,who,presumably, perished.Thank you.