'Trindacut' is a name reference to one who is the 'greatest' or 'victor'. When titled 'Trindacut', it takes the place of his/her entire name. 'Trindacut' is often preceded with a 'Sir/Madame' or 'Lord/Mistress'.
"You will be henceforth known as " Lord Trindacut".
Trindacut buried his sword into the cowering foe beneath him.