Also Maria Pia of Saxe - Coburg and Gotha Braganza claimed the right to the titles of Duchess of Braganza and to be the rightful Queen of Portugal .
Gotha Braganza claimed to be the illegitimate daughter of King Carlos I of Portugal .
Also Maria Pia of Saxe - Coburg and Gotha Braganza , who claimed to be the illegitimate daughter of King Carlos I of Portugal , claimed the right to the titles of Duchess of Braganza and to be the rightful Queen of Portugal .