Short answers, pulled from the story.
Yorkshire takes its name from the city of York. The word York is believed to derive from the Brittonic word Eburākon, meaning "place of yew trees", which became Eboracum under the Romans, Eorfowīc under the Angles, and Jórvík under the Vikings.
The Kingdom of Jórvík was founded by the Dane Halfdan Ragnarsson in 875. It was the only truly Viking territory established on mainland Britain, and Norse monarchy controlled varying portions of Northumbria from 875 until 954 when the kingdom was annexed into England.
Yorkshire Day is observed annually on the 1st of August as a celebration of Yorkshire's general culture, including its history and dialect. It marks the continued regional identity of Yorkshire despite the county no longer being used for administrative purposes.
The white rose is the heraldic badge of the Plantagenet royal House of York. It became the emblem of Yorkshire and was historically contrasted with the red rose of the House of Lancaster during the Wars of the Roses in the 15th century.
Yorkshire is officially recognised by FIFA as the birthplace of club football. Sheffield FC, founded in 1857, is certified as the oldest association football club in the world. The Laws of the Game used worldwide were drafted by Ebenezer Cobb Morley from Hull.
Yorkshire County Cricket Club has won 33 championship titles, including one shared, which is 13 more than any other county, making it the most decorated county cricket club in England.