St. Kessog was born in Cashel in Tipperary in Ireland, even as a child he is said to have worked miracles. He became a missionary and preached in Scotland, where he became a bishop. According to one tradition he was martyred at Bandry in the year 560. He is the patron-saint of Lennox and is celebrated March 10. He is also called 'Mackessog'
More can be read of this pre-schism, Orthodox saint here: http://www.stkessog.org.uk/st_kessog.htm
Troparion of St Kessog, Tone 6
Thy life was resplendent with miracles, O Hierarch Kessog,
and as thou didst devote thy life to missionary labours,
teach us the way to devote our lives to the service of the Church
that Christ our God will have mercy on our souls.
Kontakion of St Kessog, Tone 4
That God is not served by idleness is the message of thy life, O Wonderworker Kessog.
For thy ceaseless efforts thou art rewarded in heaven
and this day art praised by the Lord's lazy and most unprofitable servants.