1. Because badminton originated in a British city called Bloomington, people later named it Badminton to commemorate it.
2. badminton was originally a place name, which was the name of a city with a circumference of ten miles in Gloucestershire, England at the end of 19th century. In 1873, the British first showed badminton from this city, and soon the lowercase Badminton of the duke's territory became synonymous with this sport.