Gertrud Amon Natzler (July 7, 1908-June 3, 1971) was an Austrian-American ceramicist whose collaboration with her husband Otto Natzler helped elevate ceramics to the status of fine art.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Gertrud_Natzler

Bell with clapper and ornament by Gertrud Natzler
1962–1965 / Ceramic / 12-1/2″x8″ / Fine Arts Museums of San Francisco, CA

Gertrud Natzler on Artnet: http://www.artnet.com/artists/gertrud-natzler/

Further reading:
https://americanart.si.edu/artist/gertrud-natzler-5898
https://jwa.org/encyclopedia/article/natzler-gertrud-amon
https://www.johnmoran.com/2019/04/22/partners-in-pottery-the-life-and-work-of-otto-gertrud-natzler/