In contemporary onomastics the usage of the full name – given name and surname – lends a certain formality or seriousness to an utterance. It is often assumed that such pragmatics in the employment of names may be easily transferred to the ancient world, but we should none the less confirm our assumptions with textual evidence. This paper will present evidence from the letters between Marcus Aurelius and Marcus Cornelius Fronto which demonstrates not only that the fuller Roman name was (...) used for formal occasions, but also that it could, as in the contemporary world, be employed in an ironic, mock-formal manner to intimate rather the opposite of formality, friendship. (shrink)