In 1961-62, the Chicago Packers joined the NBA. The next year their name was changed to the Zephyrs. That team too only lasted one year, moving to Baltimore as the Bullets until the 72-73 season. In 73-74, they had the odd name of the Capital Bullets. In 74-75, they were what most people here likely remember as the Washington Bullets. In 1997, they changed to the Washington Wizards.
Source:
http://www.tealdragon.net/sports/nbamoves.htm
Also, the Baltimore Bullets (I) played 1947-1955 and was disbanded November 27, 1955.
Gosh, I feel like JR doing this research.