William Henry "Lone Star" Dietz (August 17, 1884 – July 20, 1964) was an American football player and coach.

Dietz enrolled at the Carlisle Indian School in Pennsylvania beginning in 1907 and was a star player for their football team.

[2] Dietz's heritage was first contested in 1916 after former neighbors who settled on the Pacific Coast heard he was posing as a Native American.

In December 1918 the Federal Bureau of Investigation looked into his heritage after he registered for the draft as a "Non-Citizen Indian" with an allotment.

The Bureau found he had taken on the identity of James One Star, an Oglala man of the Pine Ridge Indian Reservation 12 years his senior who had disappeared in Cuba in 1894.

Despite that others had witnessed his birth in the summer of 1884 or had seen him the following day, Dietz's mother Leanna claimed he was the Native American son of her husband who had been switched a week or more after she had a stillbirth.

After Angel De Cora died in 1919, he married Doris O. Pottlitzer, a middle-aged local journalist, on January 29, 1922.

In spring 1933, George Preston Marshall, owner of the Boston Braves, hired Dietz to replace Coach Lud Wray.

Marshall was said to have named the Redskins in honor of Dietz, who claimed to be of the Sioux Nation, by analogy with the Red Sox who shared the team's new home, Fenway Park.