International audienceIn this paper I discuss the diffusion of the suffix ‑(ι)άδ‑ in the derivational system of feminine personal names in Ancient Greek. The analysis of the data shows that ‑(ι)άδ‑ only became important in this domain of the lexicon from the 5th c. BC and that it gradually became a productive suffix. The differences attested from one region to another of the Hellenic world do not seem important from a diffusional perspective. Real nicknames like Δορκάς “Roe Deer” were popular during all the period investigated, but their role in the spreading of the suffix does not seem to be fundamental. Instead, the expansion of ‑(ι)άδ‑ was triggered by the variation of feminine ethnics like Τρωΐα/Τρωΐη vs Τρωιάς “from Troy”, a derivation...