WIKIPEDIA:

“ McKinley Morganfield (April 4, 1913April 30, 1983), known as Muddy Waters, was an American blues musician, generally considered the "father of modern Chicago blues". He was a major inspiration for the British blues explosion in the 1960s, and was ranked No. 17 in Rolling Stone magazine's list of the 100 Greatest Artists of All Time.

Early life
Although in his later years Muddy usually said that he was born in Rolling Fork, Mississippi, in 1915, he was actually born at Jug's Corner in neighboring Issaquena County, Mississippi, in 1913. Recent research has uncovered documentation showing that in the 1930s and 1940s he reported his birth year as 1913 on both his marriage license and musicians' union card. A 1955 interview in the Chicago Defender is the earliest claim of 1915 as his year of birth, which he continued to use in interviews from that point onward. The 1920 census lists him as five years old as of March 6, 1920, suggesting that his birth year may have been 1914. The Social Security Death Index, relying on the Social Security card application submitted after his move to Chicago in the mid 1940s, lists him as being born April 4, 1915. [......] ”

Read more