The paper discusses the acquisition of pronominal forms in German-speaking children. Main emphasis lies on the development of the form paradigms of definite pronouns and articles which are formally identical in German (except of the genitive forms which are not acquired in the early phase) and the functional content of the contrasting definite forms in early child grammar. On the base of an analysis of various types of overgeneralizations, it is argued here that children first acquire the lexico-semantic content related to definiteness, then functional features related to case distinctions and only later on functional features related to gender distinctions. On the contrary to previous investigations, the derived hypothesis is that a uniform case paradigm is the starting point in the acquisition of the paradigmatic relations. Gender, as a productive component of paradigm structure is realized by the child only later on. In general, the observed developments confirm assumptions of Natural Morphology and other functional theoretical concepts on the principles of paradigm organization.