Princess Maria Antónia of Braganza, Infanta of Portugal[citation needed][1] (Maria Antónia Micaela Rafaela Gabriela Adelaide Xavier Josefa Expedita Gregoria) (12 March 1903, Viareggio, Lucca, Toscana, Italy – 6 February 1973, Water Mill, Suffolk, New York) was a member of the House of Braganca.
Her namesake, the Duchess of Parma, was sister-in-law to the Villa's owner, Infanta Bianca of Spain, Archduchess of Austria.
Her parents, Miguel Januário, Duke of Braganza, and Princess Maria Theresa of Löwenstein, were the Miguelist claimants to the deposed Portuguese throne.
Maria Antónia married American heir Sidney Ashley Chanler (1907–1994) on June 13, 1934, at Burg Seebenstein.
The primary resident of the home at this time was her younger sister, Princess Filipa de Bragança (1905-1990), with whom she had a close relationship.