Rev. Alban Butler (171173). Volume III: March. The Lives of the Saints. 1866.
St. Eustasius, or Eustachius, Abbot of Luxeu
HE succeeded his master St. Columban in the charge of abbot, in 611. He sanctified himself by humility, continual prayer, watching, and fasting; was the spiritual father of six hundred monks, and of many holy bishops and saints, and died in 625. He is named in the Martyrologies of Ado, and in the Roman. See his life by Jonas, his colleague, in the Bollandists and in Mabillon.