Tel-melah is probably the Thelme of Ptolemy ('Geograph.,' 5.20), a city of Lower Babylonia, situated in the salt tract near the Persian Gulf. Hence the name, which means "Hill of Salt." Cherub is no doubt Ptolemy's Chiripha, which was in the same region.
The other places here mentioned are unknown to us, but probably belonged to the same tract of country. Tel-Harsa means "Hill of the Wood." They could not show their father's house. It is more surprising that so many of the returning exiles had preserved their genealogies than that a certain number had omitted to do so.
Considering the duration of the exile, its hardships, and the apparent improbability of a restoration, there could have been no cause for wonder if the great majority had forgotten their descent.