Who dated Urraca of León?

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 European queen to reign in her own right.

Gómez González (died 26 October 1111), called de Lara or de Candespina, was a Castilian nobleman and military leader who had some claim to being Count of Castile. He was the eldest son and successor of Gonzalo Salvadórez and his wife Sancha, and thus kinsman of the Lara family. Like his father, he perished in battle.

Pedro González de Lara (died 16 October 1130) was a Castilian magnate. He served Alfonso VI as a young man, and later became the lover of Alfonso's heiress, Queen Urraca. He may have joined the First Crusade in the following of Raymond IV of Toulouse, earning the nickname el Romero ("the wanderer, pilgrim"). At the height of his influence he was the most powerful person in the kingdom after the monarch. The preponderance of his power in Castile is attested in numerous documents between 1120 and 1127. He opposed the succession of Urraca's legitimate heir, Alfonso VII. This dispute ended with his premature death.

It was in Pedro's generation that the use of toponymics, as opposed to just patronymics, began in Spain. Pedro was the first member of his family to use the surname "de Lara", a practice continued by his descendants. A good example of Pedro's style is found in a royal charter of 1 February 1124: uenerabilis comes dominus Petrus de Lara, "the venerable count Don Pedro de Lara".