House of Lasso de la Vega
The House de la Vega, Laso de la Vega or Lasso de la Vega (sometimes even Garci Lasso de la Vega or Garcilaso de la Vega depending on the family member referenced) is a Spanish noble line from the Kingdom of Castile. The family origins lie in the areas now known as Torrelavega which was established in the Middle Ages. The House of de la Vega was one of the most important families in the territory which now makes up Cantabria and they dominated a large amount of the terrain and property between the  Torre de la Vega and the Castillo de Argüeso. This noble house merged with the House of Mendoza which subsequently adopted its motto, "Ave Maria, Gratia Plena", after the marriage of Leonor Lasso de la Vega, the daughter and only heir of Garci Lasso Ruiz de la Vega, and Diego Hurtado de Mendoza, the Head Admiral of Castile. From this marriage was born Íñigo López de Mendoza, the first Marqios of Santillana. After this union, the lordship the House of de la Vega was passed on as property of his successors, the Dukes of the Infantado. The family reached the  height of its power in the 15th Century when facing off against the monarchy. They were able to set up a system of Mayordomazgos independent of the crown and based in the Castillo de Pedraja which belonged to the family. During this time, there were a great many power struggles going on in the area of Cantabria, creating a number of social conflicts. After the merger with the House of Mendoza, the Cantabrian surname "Lasso de la Vega" was passed on through the maternal line at later times throughout the years and is associated with various soldiers, poets, and Golden  Age writers such as Garcilaso de la Vega, the soldier and poet, and Inca Garcilaso, the historian from the Viceroyalty of Peru.