The Washington Commanders were once known by which name?

The Detroit Lions were once known by which name? The Chicago Bears were once known by which name? The New England Patriots were once known by which name? The Pittsburgh Steelers were once known by which name? The Los Angeles Rams were once known by which name? Before moving to Las Vegas in 2020, the Raiders played in which city? Before moving to Los Angeles in 2017, the Chargers played in which city? Before returning to Los Angeles in 2016, the Rams played in which city?