In this paper, the emergence and use of the forms and functions of the most frequent diminutive suffixes occurring in the longitudinal data of a Greek monolingual child from age 1;8 to 3;0 are studied and compared to childdirected speech, which is rich in diminutives and hypocoristics. Furthermore, the distinction between pragmatic and semantic functions of diminutives as compared to simple nouns is explored, focussing on the innovative use of a nonstandard suffix in this particular mother-child dyad. Since diminutives occur in a high number of singular and plural forms both type- and tokenwise from 1;9 on, the relation between derivational and inflectional morphology in early child Greek is discussed.