Clement the Heretic, Irish Abbot and heretic, fl. 8th-10th centuries.
In his account of Irish monasteries in Germany, Hogan mentions an abbot of St. Martin's of Cologne, which was at the time an Irish institution: "Beatus, Virgilius, Fridolinus do not sound very Irish, yet all admit their nationality. German Protestant historians have no doubt about the Irish nationality of Clement the Heretic; yet Clement does not sound particularly Hibernian."
Nothing else appears to be known of Clement.
References
Clement the Heretic Wikipedia(Text) CC BY-SA