Juan Larrea was born in the town of Mataro (Catalunya) on June 24, 1782. He settled in Buenos Aires in the early 19th century, became a loose position as a wholesaler, for his intelligence and correction. Manuel Alberti was born in Buenos Aires on May 28, 1763. He studied advantageously until graduating doctor of theology at the University of San Carlos in Cordoba, in 1783, and receive sacred ordination. Domingo Matheu was born on 4 August 1766 in the city of Mataro, distant eleven leagues of Barcelona. He obtained the diploma of sea pilot. In 1793, having liquidated the social reason which had with his brother, decided to establish merchant in Buenos Aires. He succeeded in cultivating a good fortune.
He was also a Lieutenant of the 1st company of Minones, and attended the fighting of the Riachuelo and Miserere, during the British invasions. He took participation in the work that resulted in the revolution attending the Cabildo Abierto of May 22, 1810, to give their vote for the cessation of the command of the viceroy Cisneros. Miguel de Azcuenaga was born in Buenos Aires on June 4, 1754. He studied in Spain, and in 1773 began to provide services in the garrison of the Viceroyalty. Alderman of the Cabildo, royal ensign and later Mayor of second vote.
He served as trustee attorney general for several years. In 1796 he assumes command of the militia. He also formed part of the defence of 1807 against the English invasion. The role of the masonic lodges the character secret of the Masonic Lodges prevented for a long time to find a document that links them directly with the patriotic airs in 1810, but its members directly were the precursors of the patria grande: Jose San Martin and Simon Bolivar. It is almost impossible to date the presence of the Lautaro lodge before 1812, year in which would have begun to run the organization from which much of the illustrious Argentines formed part.