דברי הימים א ח:ו פירוש: רש״י

And they exiled them to Manahath Who exiled them? He explains this in the [next] verse: And Naaman and Ahiah and Gera - he exiled them.

Manahath This is the name of a province, as it is written (above 2:52): “who ruled over half the Menuhoth,” and it is written (ibid. verse 54): “and half the Manahtites.”