From Smith's Dictionary of Greek and Roman Biography and Mythology

THEANO

1. One of the Danaides. (Apollodorus ii)

2. A daughter of Cisseus, the wife of Antenor, and priestess of Athena at Ilion. She was painted by Polygnotus in the Lesche of Delphi.

3. The wife of Metapontus, king of Icaria.