Sean Duffy's Medieval Ireland, an Encyclopedia has a reference to Colmán moccu Cluasaig (died around 655), abbot and fear léigind (journal-keeper?) of the Monastery of Cork, whose composition Sén De don de for don te ("God's blessing, bear us, succour us") was composed to avert the Yellow Plague of 664/5 (obviously not successfully in the case of poor Colmán +RIP+) and is referred to as "one of the earliest pieces of macaronic verse in any western European vernacular, interspersing Latin phrases into an Irish adaptation of an early liturgical ordo for the dead. The list of Old Testament saints invoked, Abel, Elias and so forth, betrays Eastern liturgical influence: nothing like it exists elsewhere in Europe at this early date", plus more about Colmán.