[1][2] According to Fernão Lopes, a 15th-century Portuguese chronicler, she was a noble called Dona Tareija Lourenço from the Kingdom of Galicia, but later it was established, first in the eighteenth century by António Caetano de Sousa who found a document in the Arquivo Nacional da Torre do Tombo, that she was a common woman from Lisbon.
She had a love affair with King Peter I of Portugal after the assassination of Inês de Castro.
[2][4] King Peter confided the boy to Teresa's father Lourenço, to give the boy a good education and raise him to be a knight.
[citation needed] In 1364, John was created Grand Master of the Order of Aviz.
Through John, Teresa is the ancestor of an impressive list of royals, who include Charles the Bold, Isabella I of Castile, Maximilian I, Holy Roman Emperor, Henry the Navigator and Charles V, Holy Roman Emperor.