When Baltasara Martinez de Matos Y Velez-Borrero was born in 1716, in San Germán, Puerto Rico, her father, Teniente Gregorio Martinez de Matos, was 48 and her mother, Juana Ortiz Ortega, was 39. She married Jose Juaquin Nazario de Figueroa y de la Seda from 1716 to 1751, in San Germán, Puerto Rico. They were the parents of at least 4 sons and 4 daughters. She died on 8 September 1799, in her hometown, at the age of 83.