This paper presents online dating-site nicknames created by Polish-speaking users. After a theoretical introduction about comments on the functioning of dating sites, terminological considerations about the online nickname against other anthroponyms, and the presentation of the nicknames’ functions in relation to the current classification of the functions of literary works’ titles found in translation literature, the results of the study were presented, which included over 30,000 real names out of 1.3 million existing logins. The analysis has revealed that the classification proposed by Bechar-Israeli is still valid. Nicknames belong to the following main categories: pertaining to a person’s self: first names, character traits or physical ...