Louis de Beaumont, 2nd Count de Lerín

Louis of Beaumont (c. 1430 – 1508) was a medieval noble of the kingdom of Navarre. 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.

He was at times a strong supporter of Ferdinand II of Aragon in the dynastic Struggles between Ferdinand II of Aragon against his son in law, Philip I of Castile and became head of the so called "Beaumont faction". 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.

In December 1506 an army of 10,000 men led by Cesare Borgia and John III of Navarre besieged Louis in the Castle at Viana in Navarre, as he was an ally of Ferdinand II of Aragon. The castle was held by Louis de Beaumont and Cesare was killed during the battle.

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