In this paper we will argue that the identity of the entities that inhabit the nanoworld is a contextual identity. To defend that, we will analyse the so-called “biological” identity and the “synthetic” identity of nanomaterials. From this analysis, we will claim that nano-individuals (entities that show an intermediate nature between individuals and stuff), can be adequately understood from the perspective of a processual ontology. With that, we intend to contribute to the philosophical understanding of the ontology of the nano-domain.