Baring-Gould’s sources: Belgian, Gallican, and Benedictine Martyrologies. Authority: — A life, late, composed probably by a monk of Liesse; but at what date is uncertain, except that it is late.] S. Etto was an Irishman, a disciple of S. Fursey at Lagny on the Marne, where that Saint had settled, and erected a monastery, in or about, the year 644. That monastery was a nursery of several saints, who spread over Gaul and Belgium, a S. Emilian, S. Eloquius, S. Adalgis, and S. Bertwin. Of these, however, some were certainly not of Irish blood.

Etto settled on a little stream at Thi&ache, near the town of Avesnes, where he cleared away the brambles and built himself a cell. He was wont to visit the abbey of Hautmont, where he met S. Amandus, S. Wasno, and S. Humbert He is said to have cured a dumb cow-herd by striking him with his staff. He is thought to have received episcopal unction; but the fact wants corroboration. He died in the monastery of Fiscan, in the village of Dompierre. His relics [the bodily remains of a saint, or objects they used, kept with honor] were translated to Mons, and afterwards to the abbey of Liesse.

An arm-bone is preserved at Buinvilliers, near Arras. He is represented with oxen at his feet, as he is invoked by cow-herds and cattle drivers. He is called in French S. ZL