Extended Strong's Hebrew Lexicon (Brown-Driver-Briggs based)
Leummim
Usage: People descended from Leumm(?) of the Patriarchs, only mentioned at Gen.25.3; descended from Dedan (H1719C); along with Asshurim (H0805A) and Letushim (H3912) § Leummim = "peoples" son of Dedan and grandson of Jokshan