Acrobat, equestrienne. She is the daughter of the czechoslovaquian Alayosh Donnert and of the Hungarian Ilona Satmari, both equestrians and circus owners. She debuted at seven performing horseback riding. Margareth married Ricardo Gondor with whom she acted as a partner in magic acts. In the 1950s the couple has won a gold medal in Caracas, Venezuela for their metamosphosis trunk performance.