Original: According to Robert F. Collins of the United States Forest Service , Dr. Thomas Walker named the river , in 1750 , Louisa River , after Princess Louisa , the wife of Prince William Augustus , Duke of Cumberland ( Walker had just named the Cumberland River a month or two earlier ) .
Simplified: According to Robert F. Collins of the United States Forest Service , Dr. Thomas Walker named the river , in 1750 , Louisa River , after Princess Louisa , the wife of Prince William Augustus , Duke of Cumberland .