According to Wikipedia:
he is the son of ʻAkalana and his wife Hina-a-ke-ahi (Hina)
and according to Encyclopedia Mythica:
Maui's mother Hina complained that the sun traveled too fast across the sky.
However, in the tale of Tuna,the eel god, Hina is the wife of Maui. And in another tale, Hina is the sister of him who lends him her hair to make a net to trap the Sun. How exactly is Hina related to Maui in Hawaiian mythology?