en_tn/neh/13/23.md

Jews that had married women of Ashdod, Ammon, and Moab

"Jews that had married foreign women" God had forbidden intermarriage.

Ashdod...Ammon...Moab

These are names of places. (See: rc://en/ta/man/translate/translate-names)

Half their children

"As a result, half their children"