Danielewicz began in my tree with Daniel Chmiel who married Menucha. They lived in Lomza which is in Northeast Poland. The publication, "Landsmen" is something maybe I should receive again. There is a woman in WAshington, DC named Marlene Silverman who publishes it. I'll look into it. Chmiel married Kafka which is my last name. I heard too about conversion. However, Daniel is not common in the Jewish community and I wonder how far back they go. We were the only Danielewicz in that area. My g-grandfather was Jacob Kafka whose father was Daniel Joseph Kafka. The name Daniel is very significant in the family. "Landsmen" would have information on the Danielewicz family. Please keep in touch.