[2] The Medrano family were lords of Almarza de Cameros and the Tower of Islallana (conquered by the Count of Aguilar in 1486).

[3] By the 18th century, the Lordship of Almarza de Cameros was a jurisdiction comprising 2,263 hectares and a population equivalent to 68.5 households.

It was under the lordship of Juan de Paternina y Medrano, who collected a feudal tax known as the martiniega, amounting to 303 reales.

[6] Fuenmayor was one of the towns, along with Entrena, Medrano, and the Valle de Baztan (from where Doña María and her husband came), that paid for the maintenance of María's hospital, convent, church and commandery of San Juan de Acre in Navarrete with their tithes, which gave them the right to choose the commander who directed it.

Fernando de Medrano insisted on placing himself on a platform in front of the coffin at funerals in his supposed role as Lord of the Village, which the residents did not tolerate, leading to altercations and disputes.

A letter from the residents of Fuenmayor to the king around 1670, requested that the Council address the longstanding disputes with the Medrano family.

[9] Queen Estefanía de Nájera, widow of King García Sánchez III of Pamplona, received the privilege of joining the villages of Campo, which together with Navarrete, Hornos, Medrano, Entrena, Velilla and Fuenmayor thus benefited from the joint use of water, pastures and paths.

The House of Medrano managed their lordships and maintained their main resources, maize cultivation and especially sheep farming.

[14] Their livestock grazed in those lands, and hundreds of times they walked to the pastures of Extremadura or the royal valley of Alcudia, in La Mancha.

[23] Upon her death in 1684, her sister succeeded her as Marchioness of La Lapilla and Lady of Fuenmayor and Almarza de Cameros.

Doña Baltasara Vélaz de Medrano y Fonseca inherited the family titles upon her sister's death in April 1684, having married Luis Sarmiento de Valladares Meira y Arines Troncoso, named the first Marquess of Valladares by Carlos II in 1673.

[22] Baltasara Vélaz de Medrano y Fonseca, Marchioness of La Lapilla, Lady of Fuenmayor and Almarza de Cameros and Grandee of Spain became the patroness and benefactor of the main chapel of the Collegiate Church of Santa María, fulfilling an old promise to the railing.

[26] Diego's maternal great-grandfather was called Iñigo Ortiz de Estúñiga, Lord of las Cuevas and Chief Justice of Castile in 1317.

[30] In 1475, another Juan Martínez de Medrano, sailor, donated a panel to the church of Zumaia after he was victorious against a Portuguese fleet in 1475.

This entail outlined a succession plan that included female heirs in the absence of male ones, Íñigo's attempt to ensure the continuity of the Zúñiga lineage.

His role in this arrangement was significant as a contingency beneficiary, representing the broader family network and its integration into the entail's provisions.

[34] Diego López de Medrano y Zúñiga helped his maternal nephews with strong financial donations and lands in many La Rioja towns.

His conflicts weakened the monarchy’s influence in the region and fueled ongoing noble rivalries in La Rioja.