Erica Yohn (October 1, 1928-January 27, 2019) was the first voice actress behind Mama Mousekewitz in the first three An American Tail movies, An American Tail, An American Tail: Fievel Goes West, and An American Tail: The Treasure of Manhattan Island respectively.
She did not reprise the role for Fievel's American Tails and An American Tail: The Mystery of the Night Monster for it was taken over by Susan Silo and Jane Singer.
Other roles of hers include the film Corrina, Corrina, and the TV series State of Grace (which starred Pat Musick's daughter Mae Whitman), to name a few.