Urraca of León and Castile

Urraca (León, 1081 – Saldaña, 8 March 1126), called the Reckless (La Temeraria), was Queen of León, Castile and Galicia from 1109 until her death. She claimed the imperial title as suo jure Empress of All Spain and Empress of All Galicia. She is considered to be the first Western European queen to reign in her own right after the Byzantine Empresses of the east.

Source: Wikipedia — https://en.wikipedia.org/wiki/Urraca_of_Le%C3%B3n_and_Castile