The largest city of Williamson County, Texas is Round Rock and Austin is part of Williamson County and Travis County.
ALV X-1 hails from the US where Native Americans are an ethnic group and the Star Spangled Banner is the anthem.
Williamson County, Texas | largest city | Round Rock, Texas Austin, Texas | is part of | Williamson County, Texas Austin, Texas | is part of | Travis County, Texas ALV X-1 | country origin | United States United States | ethnic group | Native Americans in the United States United States | anthem | The Star-Spangled Banner