Probably a modern elaboration of Adriana, from Hadrianus meaning from Hadria.
Dadriana is probably a modern elaboration of Adriana, ultimately from Hadrianus, meaning "from Hadria." That root gives it a place-based and classical background, tied to the old Roman world rather than to biblical or mythic tradition.
The added initial syllable makes the name feel less historical and more creative, as if Adriana has been dressed in a new sound shape. Its effect is elaborate and ornamental, with a formal rhythm that feels familiar but not standard. Dadriana belongs to the modern taste for expanding existing names into more decorative forms, often to create distinction without losing recognizability.
The result is a name that feels romantic and slightly theatrical, with the classical bones of Adriana still visible underneath. It has a sense of movement and flourish, more elaborated than traditional, more styled than inherited.