Building upon recent phraseological studies of Old High and Middle High German texts, the alliterating word pairs in the later works of Hartmann von Aue are catalogued and analyzed philologically, thus contributing to an emerging complete listing of the paired rhetorical expressions through the Early Middle High German period, here Hartmann’s major courtly Arthurian romance, Iwein, his religious tale Gregorius, and Der arme Heinrich. Each pair is listed, described in the context in which it appears, and compared with any extant pairs from earlier German works. Previous research on the pair is reviewed. Hence, we trace the evolution of these expressions, in some cases through centuries. On the one hand, Hartmann employs alliterating expressions that date to the Old High German period, while on the other hand apparently creates new, or at least not previously documented ones. As in findings in earlier texts, pairs recorded on multiple occasions are likely to have been used by other authors. Typical for medieval German texts - when compared to similar modern expressions - is the insight that there is a fair amount of variation concerning the sequence of the alliterating elements and/or the inclusion of morpho-syntactic modifiers such as pronouns, possessives, adjectives, or adverbs. When known, later examples of the alliterating word-pairs are cited, albeit for obvious reasons only in an incomplete fashion. Two updates on the emerging Old High and Early Middle High German word-pair catalogue are included. Finally, a complete listing of the alliterating word-pairs in Hartmann’s works is provided. The long-term project continues to chart the emergence of German alliterating word-pairs chronologically, here within the first decade of the thirteenth century.