St Tysilio was son of the King of Powys. His name means ‘dear little Sunday’s child’ He went to Meifod to become a monk and later made a hermitage for himself on a little island in the Menai Straits on the North Wales coast. From here he spread the Gospel on Anglesey and may even have been a bishop. Later still he went to Brittany where he established a monastery at St Suliac.
Troparion of St Tysilio tone 8
Princely dignity was set at nought by thee, O Father Tysilio,
for thou didst put aside the glory of this world preferring to serve God in monastic poverty.
Wherefore we pray thee, intercede for us, that with courage we may renounce mammon
and live only in Christ for the salvation of men’s souls.