Hanun in Wikipedia
Hanun was a king of Ammon described in 2 Samuel. Upon the
death of his father Nahash, Hanun ascended to the throne of
the Ammonites. When King David sent ambassadors to convey his
condolences, Hanun reversed his father's pro-David policy and
humiliated the emissaries, stripping them of their clothes and
shaving half of their beards. He joined with Hadadezer of
Damascus against Israel but was defeated and deposed. His
brother Shobi was made king in his stead and became a loyal
vassal of David's.
Hanun was also the name of a Jew who returned from the
Babylonian Exile and, with the people of Zanoah, repaired the
valley gate in the wall of Jerusalem. (Nehemiah iii. 13)
Hanun ben Zalaph was the sixth son of Zalaph, who also
assisted in the repairing of the wall (ib. iii. 30).
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