Maria Rosa Conti was born at the Palmeiras site in Uchoa, São Paulo, Brazil, on 3 July 1915. Her parents were José Bento do Carmo and Virgínia Rosa da Conceição. She had six siblings that survived infancy: Benedicta, Sebastiana, Antonio, João, Anna, and Joaquim.
On 11 April 1940, she married Atilio Conti. The couple had four daughters: Evalina, Célia, Maridalva, and Vera. She was widowed in 2007. Maria has always loved music. She still listens to it every day. At the age of 109, she has nine grandchildren, 13 great-grandchildren, and six great-great-grandchildren.
Her age was verified by Gabriel Ainsworth, Iara Souza, and Filipe Lopes, and validated by LongeviQuest on 6 January 2025.