Was upper Volta renamed

Yes, Upper Volta was renamed to Burkina Faso on August 4, 1984. The name Burkina Faso means "Land of Incorruptible People" in the Mossi and Dyula languages.

Was Burkina Faso renamed

No, Burkina Faso has not been renamed since it was officially named in 1984. The country's full name is "Burkina Faso" and it remains the same to this day.