In the earliest surviving list, that in the Baile Chuind, Túathal appears not under his own name but as the kenning Óengarb. Túathal Máelgarb is portrayed in a poor light by later writers dealing with the life of Diarmait mac Cerbaill.
In the earliest surviving record, found in the Baile Chuind, Túathal is not identified by his name but as the kenning Óengarb. Later accounts concerning Diarmait mac Cerbaill's biography depict Túathal Máelgarb unfavorably.