This chapter deals with onomastic homonymy as a phenomenon of ancient Greek literary history. Focusing first on early Greek poets about whom ancient testimonies claim there were doublets (Euenus, Xenophanes, Alcman and Sappho), the chapter moves on to examine doublets of poets emerging in the Parian Chronicle (Simonides, Sosiphanes, Stesichorus, Melanippides), to conclude with the Phocian Homer of Byzantine scholarship (Tzetzes). After distinguishing between historical homonyms and scholarly constructs, the chapter examines the possible reasons behind the duplication of poets, most particularly the need to deal with conflicting details in the transmitted biographies while preserving the textual tradition.