Menendo González (Portuguese and Galician: Mendo Gonçalves;^[a] died 6 October 1008)^[2] was a semi-autonomous Duke of Galicia^[b] and Count of Portugal (997–1008) and a dominant figure in the Kingdom of León around the turn of the second millennium. He was the armiger regis, or royal alférez, the king's armour-bearer and commander of the royal armies, under Vermudo II, and he continued to hold the position until his death. He became the tutor (1003) and ultimately father-in-law of Vermudo's successor, King Alfonso V. He maintained peaceful diplomatic relations with the Caliphate of Córdoba until 1004, after which there was a state of war.
Menendo González was probably the eldest son and successor of Gonzalo Menéndez and his wife Ilduara Peláez. Menendo's wife is variously known in contemporary sources as Toda, Tota, Todadomna, Tutadomna, Tutadonna, etc. One twelfth-century source calls her Mayor.^[

Gonzalo Menéndez (or Gonçalo Mendes) (fl. 950–997) was a Count of Portugal in the Kingdom of León. He regularly carries the title count (comes), the highest in the kingdom, in surviving documents. He may have used the title magnus dux portucalensium ("great duke of the Portuguese").^[1] His name in contemporary records is usually spelled Gundisaluus Menendiz.

Gonzalo was a son of count Hermenegildo González and Mumadona Dias, and named for his grandfather, count Gonzalo Betótez. His father was dead by 950, when his widow distributed some of his lands. In the pertinent document Gonzalo is mentioned for the first time (24 July 950).

Ilduara (Ildonza) Peláez, his first cousin, the daughter of his father's brother, Pelayo González, Count of Deza, by the latter's wife, Hermesenda Gutiérrez, sister of Saint Rudesind. She is first mentioned, though not as his wife, in 961. She was dead by 983

Hermenegildo González or Mendo I Gonçalves (died ca. 943–950) was a Galician count in the 10th century Kingdom of León, tenente in Deza, and the ancestor of one of the most relevant Galaico-Portuguese lineages of the Early Middle Ages. He appears in medieval charters confirming as Ermegildus Gundisaluis.

The son of count Gonzalo Betótez and Teresa Eriz, and maternal grandson of count Ero Fernández, Hermenegildo had several brothers and sisters, including Aragonta González, who was the wife of Ordoño II of León before being set aside, and count Pelayo González.^[1]^[2]

He begins to appear in medieval charters in 926, and apparently died relatively young, as he is no longer seen after 943, and certainly by 950 when his widow and children divide the inheritance, while his widow continues to appear through 981.

Mumadona Dias, or Muniadomna Díaz (died 968), was a Countess of Portugal, who ruled the county jointly with her husband from about c. 920 and then on her own after her husband's death around 950 until her death in 968. Celebrated, rich and the most powerful woman in the Northwest of the Iberian peninsula, she has been commemorated by several Portuguese cities.

She was one of the three daughters of Count Diogo Fernandes and of countess Onega (or Onecca) who had been the tutors of the future King Ramiro II of León.^[a] Between 915 and 920 and, most certainly by 926—the year in which they appear together for the first time when King Ramiro II gave the couple the villa of Creximir near Guimarães^[7]^[8]^[9]— she married Count Hermenegildo González.