Clearly, you don't know how that name came about. Despite the fact that twice now in this thread Perotista has provided the history of the name of the team.
So here it is a third time, courtesy Perotista and Wikipedia.
The Washington Redskins were originally known as the Boston Braves. In 1933, co-owner George Preston Marshall changed the name to the Redskins, possibly in recognition of the then–head coach William Henry "Lone Star" Dietz, who claimed to be part Sioux. On July 6, 1933, the Boston Herald reported that "the change was made to avoid confusion with the Braves baseball team and the team that is to be coached by an Indian (Dietz)... with several Indian players."[6] Dietz's ancestry has been questioned by some scholars, as a birth certificate and census records recorded his parents as white. This does not preclude his having had Sioux ancestry as well.[7] In 1933, the Boston Braves moved from Braves Field, which they shared with baseball's Boston Braves, to Fenway Park, already occupied by the Boston Red Sox. John F. Banzhaf III, Professor of Public Interest Law at George Washington University Law School, cites a newspaper article from 1933 in which Marshall is quoted as saying the name was selected only to save money by not having to change the logo of the Braves, and not to honor Dietz or the Indian players.[8] There was however, no logo on the Braves football uniform of 1932. The Washington Redskins current logo, which was inspired by Native American, Walter Wetzel, former president of the National Congress of American Indians, was introduced in 1972.[9]