sidneySidney (often shortened to Sid) is an English given name deriving from the surname, itself of two different derivations depending on the orins of the family. In some cases a place name, itselfSidney is a city in Shelby County, Ohio, United States, and its county seat. [4] The population was 20,421 at the 2020 census.It is approximately 36 miles (58 km) north of Dayton and 100 miles