From Proto-Tai *ruːᴬ (“hole”). Cognate with Thai รู (ruu), Northern Thai ᩁᩪ, Lao ຮູ (hū), Lü ᦣᦴ (huu), Tai Dam ꪭꪴ, Tai Dón ꪭꪴ, Tai Daeng ꪭꪴ, Shan ႁူး (húu), Phake ꩭူ (hū), Ahom 𑜍𑜥 (rū), Nong Zhuang ruz or luz.
ꩭူး (transliteration needed)
