Perhaps denominative from yareach; (born at the) new moon; Jaroach, an Israelite -- Jaroah.
see HEBREW yareach
H3386. Yaroach
יָרוֺחַ proper name, masculine a Gadite, 1 Chronicles 5:14; ᵐ5 Ιδαι, ᵐ5L Αρουε.
יְרֵחוֺ see יְרִיחוֺ below
יְרַחְמְאֵל יְרֹחָם, see below רחם.