Career
He was the 2nd Count of Lerín in Southern Navarre, Marquis of Huesca and Connetable de Navarre. Louis prospered initially due to much of the civil strife following the “War of the Bands in the Basque territories of Northern Spain. In, a treaty between the Navarrese rulers and King Ferdinand II, Ferdinand promised to stop warring on Navarre or Béarn, and in exchange Louis was to hand over some strategic fortresses in exchange for new lands in Granada.
However, when the promise was reneged, in an attempt to restore royal authority and patrimony, the king met with the resistance of the defiant count Louis of Beaumont, whose estates where subsequently confiscated.
He reportedly assassinated Felipe de Navarra, Marshal of the Kingdom, in 1479. The castle was held by Louis de Beaumont and Cesare was killed during the battle.
In 1507 Louis was charged with treason, dispossessed and sentenced to death, but he escaped to Aragon where he died in 1508 at Aranda. Private On the 22 January 1468 at Tarragona Louise married Eleonore d"Aragon the iligitimate daughter of king Juan II d"Aragon, and they had four children:
■ Louis III de Beaumont
■ Ferdinand de Beaumont
■ Anne de Beaumont married to Juan de Mendoza, brother of Diego Hurtado de Mendoza, 2nd Marquis of Cañete
■ Doña Catalina de Beaumont
He also had three illegitimate sons:
■ Pierre de Beaumont
■ Jean de Beaumont
■ Luis de Viana Beaumont.