Watford Football Club is an English professional football club based in Watford, Hertfordshire. As of the 2022/23 season, they play in the EFL Championship, the second tier of English football.

Watford's initial nickname was 'The Brewers', in reference to the Benskins Brewery, which owned the freehold of the club's Vicarage Road stadium. This nickname did not prove particularly popular, and upon the adoption of a blue-and-white colour scheme in the 1920s, the club became predominantly known as 'The Blues'. When Watford changed kit colours in 1959, supporters chose 'The Hornets' as the team's new nickname, and the club later introduced a crest depicting a hornet.

In 1974 the kit design was changed to depict 'Harry the Hornet', the club's mascot. The club's nickname remains, but in 1978 the hornet crest was replaced by a depiction of a hart – a male red fallow deer– on a yellow and black background. A hart represents the town's location in the county of Hertfordshire.

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