Topeka is the capital city of the U.S. state of Kansas and the county seat of Shawnee County. It is situated along the Kansas River in the central part of Shawnee County, located in northeast Kansas, in the Central United States. The population was 122,377 at the 2000 census, and it was estimated to be 122,647 in the 2007 census. The Topeka Metropolitan Statistical Area, which includes Shawnee, Jackson, Jefferson, Osage, and Wabaunsee counties, had an estimated population of 226,268 in the year 2003. Three ships of the US Navy have been named USS Topeka in honor of the city. Topeka means "to dig good potatoes" in the languages of the Kansa and the Ioway. The potato referred to is the prairie potato, Psoralea esculenta, a perennial herb which is an important food for many Native Americans. As a placename, Topeka was first recorded in 1826 as the Kansa name for what is now called the Kansas River. Topeka's founders chose the name in 1855 because it "was novel, of Indian origin and euphonious of sound. " The city, laid out in 1854, was one of the Free-State towns founded by Eastern antislavery men immediately after the passage of the Kansas-Nebraska Bill. In 1857, Topeka was chartered as a city. On March 1, 2010, Topeka Mayor Bill Bunten issued a proclamation calling for Topeka to be known for the month of March as "Google, Kansas, the capital city of fiber optics. " This was to help "support continuing efforts to bring Google's fiber experiment" to Topeka, though it was not a legal name change. Lawyers advised the city council and mayor against an official name change.