1) Greek boy name 2) Theban king 
Andreus (s; Ἀνδρεύς) was the son of the river-god Peneus in Thessaly, from whom the district about Orchomenos in Boeotia was called Andreis. In another passage Pausanias speaks of Andreus (it is, however, uncertain whether he means the same man as the former) as the person who first colonized the island of Andros. According to Diodorus Sic...