Or Arnon {ar-nohn'}; from ranan; a brawling stream; the Arnon, a river east of the Jordan, also its territory -- Arnon.
see HEBREW ranan
H769. Arnon
אַרְנֹן אַרְנוֺן, proper name, of a river Arnon, wady & stream in Moab (MI ארנן, Thes Add Rob Ges MV derive from רנן, i.e. the rushing, roaring stream) — אַרְנוֺן Numbers 21:13 (twice in verse) + 12 t., אַרְנֹן 21:14 10t. — called boundary between Moab & Amorites 21:13; Judges 11:18, 22 compare גְּבוּלאַרְנֹן Numbers 22:36; often אֵרְנֹן נַחַל Deuteronomy 2:24, 36; 3:8, 12, 16; 4:48; 2 Kings 10:33; ׳נ אַרְנוֺן Joshua 12:1-2, 13:9, 16; אַרְנוֺן הַנְּחָלִים Numbers 21:14, i.e. the stream-ravines that unite to form Arnon, compare Di; also אַרְנֹן בָּמוֺת heights of Arnon 21:28; אַרְנוֺן מעברות fords of Arnon Isaiah 16:2; elsewhere Numbers 21:13, 24, 26; Judges 11:13, 18, 26; synonym of Moab Jeremiah 48:20; (compare TristrMoab 125 f.; modern Môjib).
II. ארן (√ assumed for following word, compare Sta§ 208 c; DlPr 125 argues for √ ארה (so Thes), on ground of an Assyrian êrû, synonym of êrênu).