Matthew I (or Matthias I, died 1050 or 1051) was the Count of Nantes from 1038 until his death.
They then obtained consent to their illegal scheme from the councillors of Count Matthew, who was still a minor, by buying them off with silver.
Matthew was one of the recipients of the letter addressed by Pope Leo IX to the princes of Brittany explaining the council's actions.
The Chronicle goes on to say that afterwards Budic and Matthew were "inseparable until death" (connexa ... usque ad finem vitae).
[2][3] Matthew was succeeded by his aunt, Judith, and her husband Alain Canhiart.