The name Chanin is a Jewish female name with variants Chanina and Chanine. The meaning i don't know for sure. That's why my subject title asks for help. Miss Claire and Andy know a lot about Hebrew names.
1-From the medieval feminine name Hannah or Anna which is of Hebrew origin, meaning 'He (God) has favored me (with a child).' 2-A habitation name for an unidentified place. 3-Anglicized form of the Gaelic word O'hAnnaigh, 'descendant of Annach.' The given name Annach meaning 'antiquity' (Hanks & Hodges, p.238) or 'transgression or immortality.' (Chester & Robb, p.234)