Valentina and Zinaida Brumberg, Jewish sisters who became known as the “Grandmothers of Soviet Animation” for their contribution to the field of animated fairy tales within the Soviet Animation studio Soyutzmultfilm.

https://www.youtube.com/watch?v=7rHnevSiUfg#action=share

For more information:
Drawing the Iron Curtain: Jews and the Golden Age of Soviet Animation
https://animation-stories.com/tag/the-brumberg-sisters/

http://booksandjournals.brillonline.com/content/journals/10.1163/18718000-12340055