Diogenia

In the Attic mythic genealogical tradition preserved in sources derived from the Library of Apollodorus and summarized in later lexica and summaries, Diogenia is named as a daughter of the river-god Cephisus. She is presented primarily in family-list contexts: she married Phrasimus and bore Praxithea, who in turn married Erechtheus of Athens. These relationships serve to connect the elemental/divine presence of a local river with the dynastic and civic origins of Athenian kingship rather than to narrate a life-story or mythic adventures for Diogenia herself (sources: Apollodoran tradition as reflected in the "Kings of Athens" passage; modern summaries such as the cited Wikipedia entry).

No physical description or standardized iconography for Diogenia survives in the provided sources. Her attestations are genealogical and locative rather than descriptive; the classical passages that mention her record name and descent but do not supply bodily or iconographic detail (sources: Apollodoran-type genealogies and compendia summarized in modern references).

The surviving material does not ascribe any specific powers, miraculous acts, or characteristic behaviors to Diogenia. She is attested only as a named naiad-daughter of Cephisus and as wife and mother within a royal pedigree; no texts in the provided corpus record feats, interventions, or ritual function for her individually.