Eustasius
Martyrological notice
In the monastery Luxovium, the deposition of St. Eustasius, abbot, disciple of St. Columban, who was father of almost six hundred monks, and famous for holiness of life, was also renowned for miracles.
Alban Butler: January–March · ST. EUSTASIUS, OR EUSTACHIUS,
SUCCEEDED his master St. Columban in that charge, 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.
Martyrologium Romanum · Latin witness
In monasterio Luxoviensi, in Gallia, depositio sancti Eustasii Abbatis, qui sancti Columbani discipulus et ferme sexcentorum Monachorum Pater fuit; ac, vitae sanctitate conspicuus, etiam miraculis claruit.