Geography, chronology and onomastics suggest that he may have been a son of Vela Jiménez, who was the count of Álava during the battles of Cellorigo in 882–83.
[1] The document of 18 May 919 shows Munio presiding over a lawsuit between the monastery of Valpuesta (now lost, but possibly located in Álava) and the church of Santa María del Puerto in Santoña.
[3] The dating clause of the charter indicates places it during the reign of "lord Ordoño in León and count Munio Vélaz in Álava".
[a] This document has been used to argue that not only Espejo, but Valpuesta itself, along with the castle of Lantarón and the valleys of Losa, Mena and Tobalina, belonged to Munio's county, if not also Cellorigo, Grañón and Cerezo.
She contracted a second marriage with Galindo, son of Count Bernard I of Ribagorza, and a third with Fortún Galíndez.