From an article called “Names In News Become Names For Children” in the November 24, 1963, edition of the Indianapolis Star:
Soviet parents are tending to name their children after currently fashionable personalities. During and after Fidel Castro’s tour of Russia, scores of boy babies were given the not-so-Russian-sounding name of Fidel. The Moscow Statistics Bureau has reported 55 young Fidels in Moscow alone. Later, with woman cosmonaut Valentina Tereshkova in orbit, half the newly born girls in Moscow were named in her honor.