A May 2021 Pew Research Center study revealed that younger Jews in the United States were more likely than older generations to migrate to the religion’s extremes; compared to their elders, more American Jews in the 18-49 demographic identified as either Orthodox or of “no particular branch.” These are also the Jewish generations bringing new Jews into the world and, in naming their babies, they are exhibiting similar trends. Philadelphia-area rabbis and cantors who officiate at baby-naming ceremonies are seeing parents both rediscover classic names and bring new ones into fashion. Cantor Mark Kushner is a full-time, certified mohel, as...