Luise Mühlbach
Mundt, Clara Maria Regina Müller
January 2, 1814 – September 26, 1873 (aged 59)
Birth place: Neubrandenburg, Duchy of Mecklenburg-Strelitz, German Confederation
Wrote her historical novels as by "Louisa Muhlbach" (at least in English translations), although Wikipedia spells that as "Luise Mühlbach".