Theodemir or Theodemar (also Teodomiro,[1] Latin: Theodemirus; died 570) was one of the last Suevic kings of Galicia and one of the first Chalcedonian Christians to hold the title.
This theory is largely based on the Historia Suevorum of Isidore of Seville: regni potestatem Theodimirus suscepit: qui confestim Arrianae impietatis errore destructo Suevos catholicae fidei reddidit.
[2] However, other sources, notably John of Biclarum and Gregory of Tours, plus the minutes of the First Council of Braga, give or imply different occurrences: John that Reccared I of the Visigoths brought about the conversion of both peoples, Gregory that the saintly intercession of Martin of Tours at the bequest of the king Chararic brought it about, and the minutes of First Braga that Ariamir was the first to lift the ban on orthodox Catholic synods.
[5] Ferreiro believes the conversion of the Suevi was progressive and stepwise and that Thoedemir was responsible for beginning a persecution of the Arians in his kingdom to root out their heresy.
[6] In 569 Theodemir called the First Council of Lugo,[7] which increased the number of dioceses within the kingdom.