Date Mother Age of mother Father Country Description December 5, 1759 Anna Mummenthaler 8 years, 9 months A relative of her parents Old Swiss Confederacy (now Switzerland) Anna Mummenthaler of Lauperswil, Canton of Bern gave birth to a stillborn girl when she was 8 years old.[8] December 1884 Mum-Zi 8 years, 4 months Chief Akkiri Niger Coast (now Nigeria) Mum-Zi was a member of Chief Akkiri's harem on the island of Calabar.