A charter dated 6 Jun 878 records judgment in the court of “domini...Adephonsi principis...vel judicum Gatoni et Hermigildi” confirmed the possession of “villa Vimineta”, populated by “comite Gaton” during the reign of “domni Ordonii”.
[Mayordomo of Alfonso III King of Asturias, Galicia and León 25 Sep 883. "…Ermegildus maiordomus…" subscribed the charter dated 25 Sep 883 under which "Adefonsus rex et Exemena regina" donated property to the church of Coimbra. This entry could refer either to Hermenegildo Pérez or to Hermenegildo Gutiérrez. Torres suggests that Hermenegildo Gutiérrez was charged by Alfonso III King of León with the repopulation of Coimbra. However, the identification of the colonist of Coimbra presumably depends on the correct identification of the subscriber of the charter dated 25 Sep 883.] He helped to crush the rebellio of Conde Witiza against King Alfonso III and was awarded the rebel's territories in compensation.
Conde [de Tuy y Portugal]: the Cronica de Sampiro (interpolated, España Sagrada edition), after quoting Papal correspondence relating to Santiago de Compostela, records a council held in Oviedo dated 7 May 899 in the presence of all the bishops and “Alvarus Lunensis comes, Veremundus Legionensis comes, Sarracinus Astoricæ et Verizo comes, Veremundus Torrensis comes, Berotus in Deza comes, Ermenegildus Tudæ et Portugalæ comes, Arias filius eius Eminio comes, Pelagius Breganciæ comes, Odoarius Castellæ et Aucæ comes, Silus Prucii comes, Erus in Lugo comes”. The territorial attributions are atypical of contemporary documentation which suggests that the charter is spurious. However, many of the names are recognizable as noblemen who are recorded at that time in other documents. “...Ermenegildus Tudæ et Portugalæ comes...” presumably refers to Hermenegildo Gutiérrez. Torres highlights that no other documentary evidence supports this territorial attribution. 1