Habia, probably from habe(a), is an element in river names as:
It may also be found in names as: Azkabi (Lohitzun), Habiaga (Ainharp, Arrast-Larrebieu, Iholdy), Zehabia (Armendarits), Zehabiaga (Chéraute), Intzabi, Okabe…
The word habia means 'nest' in modern Basque. Its original meaning is 'hole', 'lower place', where rivers flow.
References
Habia (placename element) Wikipedia(Text) CC BY-SA