According to the Editorial Mintzoa, driven by profound loyalty, and marked by virtue, Medrano's enduring legacy is his unwavering resistance to Spanish conquest, embodying the spirit of Navarre's struggle for sovereignty.

[7] Jaime Vélaz de Medrano was primarily a noble trained for warfare, deeply rooted in the Agramontese tradition, and even served in the personal royal guard of King John III of Navarre.

[8] On 30 June 1521, the Franco-Navarrese forces led by Asparrot suffered a pivotal defeat on the plains of Noain near Iruña/Pamplona, leading to the retreat of King Enrique de Albret's loyalists, including Jaime.

[11] That autumn, the defeated troops, under Marshal Bonnivet, reclaimed parts of the Navarrese Pyrenees, culminating in the 29 September 1521 siege of Amaiur Castle, and on 2 October 1521, Medrano would take up government in Amaiur-Maya.The battle of Amaiur-Maya in 1522 marked the height of his career.

[1] In the Baztán valley's fortress of Maya, 200 Agramontese knights and 8 or 9 nobles led by Jaime Vélaz de Medrano defended the Castle of Amaiur-Maya against the forces sent by Charles V, Holy Roman Emperor.

This surrender marked the final conflict between the Beaumont and Agramont factions, concluding a sixty-year feud that had fueled devastating civil wars and led to the fall of the Old Pyrenean Kingdom.

[13] Historians note that the tenacity of the Navarrese was remarkable: enduring 9 days of relentless bombardment using rudimentary weapons like stones, crossbows, and possibly a musket, along with tar.

When the Spanish viceroy expressed surprise at the fierce resistance of the Amaiur defenders, the Count of Lerín, hailing from Beaumont, remarked, "Those, my lord, are Navarrese.

[15] Jaime Vélaz de Medrano's correspondence emerged at a time when Navarre had just undergone the battle of Noáin in June 1521, and except for two letters from between 1500 and 1512, all the rest are from November 1521 to seven days before the fall of the castle of Amaiur.

"[16] A letter from the lord of Bonnivet, Admiral of France, to Jaime Vélaz de Medrano, alcaide of Maya, informs him of the dispatch of the comptroller to pay the garrison of the castle, to be reduced to 100 soldiers, and of the shipment of provisions.

[3] Another letter from Clement Le Jarc to Don Jaime Vélaz de Medrano informs him of the dispatch of 20 escudos in payment for the cider and requesting a report of the provisions received.

[21] Another letter from Henry II of Navarre to Jaime Vélaz de Medrano on 26 March 1522 informs him of the dispatch of the Lord of Gelás, his chief squire, with news on his behalf.

[24] Jaime's relative Juana de Echauz, Lady of Ezpeleta, wrote to him and informed Medrano of the imminent attack by the Spanish and the arrival of the substitute for the Lord of Saint André, lieutenant of Guyenne.

Despite the Viceroy Count of Miranda's efforts to protect them, some accounts report Jaime Vélaz de Medrano y Echauz and his son Luis were found deceased later that month, suspected to have been poisoned, however there is limited information to verify this.

Historian Peio Monteano provided an analysis of these documents, which reveal the sentiments of loyalty and national identity among the Navarrese during a tumultuous time marked by the battle of Noáin in 1521.

Facing external threats, the lords rallied their kin, distributed weapons, and formed a small army to unite with forces from other Navarrese valleys.

[31] The noble Medrano family were deeply loyal and are related to the Navarrese and French monarchs, when the last French ruler from the House of Capet fell, Jaime's direct ancestor Juan Martínez de Medrano y Aibar was elected by the Navarrese Cortes as regent of the Kingdom in the year 1328, while Queen Juana II, who was in Paris, was unable to assume the throne.

Many principles are attributed to them by authors and historians "for its antiquity, its splendor, for their military prowess and virtue and for every other value of chivalry that prospered with this family, in great numbers, magnificent and generous.

However, his maternal grandfather, the 15th Viscount of Baigorri, participated in the unstable political situation in Navarre, which evolved into the conflict between the Beaumontes side and the Agramonteses.

[44] The Prince of Viana granted the Santacara estate and its royal castle to Don Juan Vélaz de Medrano y Echauz, a member of the Beaumont family.

In 1500, Don Juan Vélaz de Medrano resided at the castle for eight to ten years, remaining loyal to the Navarrese monarchs.

Don Juan Vélaz de Medrano valiantly resisted the Castilian conquest and, following the successful takeover of Navarre by Fernando el Católico, he followed his rightful king into exile in France.

Stationed in France, Jaime, Juan and Julián Íñiguez de Medrano participated in the effort to reclaim the Navarrese throne.

As noted by Jerónimo Zurita in the Annals of the Crown of Aragon, several castles including those of Sancho Abarca, Mélida, and Santacara, among others, were demolished in December 1512 after Navarre's unsuccessful bid for independence.

[45] In 1513 Don Juan Vélaz de Medrano was already listed among the quarter remitters of the merindad (administration and financial governance of the Estella region).

[47] In 1543, there are records of his son Juan Vélaz de Medrano y Mauleon y Navarra, Lord of Orendain, Agos, Learza, Igúzquiza, Aguiñaro (Arguiñano), Arróniz, and Zabala (Zabalza).

[48] After the conquest of Navarre, the king and queen decreed restrictions on travel for several notable figures, including mossen Juan Velaz de Medrano.

[49] A folk-rock band of Basque origin known as Lur Barnea published a trilogy called "Amaiur" on 13 October 2022 in honor of Jaime and the battle of Amaiur-Maya, written by Aingeru Gorrotxategi.