Carlota Ferreira (born Petrona Mercedes Ferreyro García; 31 January 1838 – c. 1912) was an Uruguayan woman who led a turbulent life of scandal and romance.

She was immortalized by Juan Manuel Blanes's 1883 portrait of her likeness, which became an icon of Uruguayan art.

[1][2] In 1872, she was widowed by her husband and father of their three children, Dr. Emeterio Celedonio Regunaga, the Uruguayan Minister of Finance 23 years her senior, during the government of Lorenzo Batlle y Grau.

The family of her second husband, descended from José Joaquín de Viana, were embarrassed over the short-lived marriage.

[citation needed] It was 1883 when Ferreira visited the studio of Juan Manuel Blanes as the widow of Dr. Regunaga to request a portrait of her deceased husband, armed with photographs for reference.