Answer
Yes, Cantinflas had one son, Mario Moreno Ivanova, born on August 30, 1961, to Valentina Ivanova, a Russian woman with whom Cantinflas had a 20-year relationship. Mario Moreno Ivanova used the stage name "Cantinflasito" (Little Cantinflas) at the beginning of his career. He later became a film producer, businessman, and politician.