The NFL team that refers to the six Roman rulers is the Washington Commanders. The team's previous name, the Washington Redskins, included a reference to the ancient Roman emperors through the term "Redskins," which some interpretations linked to the term "Caesars." However, this connection is more tenuous and not widely recognized. The team rebranded to the Commanders in 2022, moving away from its controversial history.
sixers
The Vikings, that is the VI Kings or 6 Kings (i.e. six roman rulers).
The Arizona Cardinals.
Dallas Cowboys
Tennesee titans
redskins.
A '500 team' is a team that has won the same number of games as they have lost. The '500' refers to the team's winning percentage.
The NFL team that is called the opposite of ewes is the Los Angeles Rams. "Ewes" refers to female sheep, and the term "rams" refers to male sheep. Therefore, the name "Rams" represents the opposite gender in the sheep classification.
Bills.
Bengals Bengal tigers originate from India
There is no NFL team that is named after a fowl. The closest I can think of is a derogatory nickname used for the Seattle Seahawks. They are often called the "Sea-Chickens" by fans of opposing teams.
2nd round draft, for The Saints (New Orleans)