Never throughout history has a man who lived a life of ease left a name worth remembering.
-- Theodore Roosevelt
"Quhr" would be a fine name for a company or brand; it's short, strong, and pronounceable -- rare for affordable LLLL domains.
Radio test: The "Q" could be mistaken for "C" or "K," so, generally, this would not be a radio term. However, because of its short length, radio advertising might be doable if the announcer carefully pronounces the name and then slowly spells out the entire domain:
In short, Quhr is primarily a visual term: internet, TV, print. If you plan to use radio spots extensively for advertising your product or service, we recommend that you find another name.
"Quhr" and its variations ("Q Urh," Qu Hr," and "Quh r"), do not appear in the USPTO.gov data bases.
(Includes domain and logo.)