List of Texas County Seat Name Etymologies

County Seat	County	Named for
Daingerfield	Morris	Captain London Daingerfield, who was killed in an 1830 battle with Indians on the site that became the town in the 1840s
Dalhart	Dallam	Its location on the border between Dallam and Hartley counties
Dallas	Dallas	Uncertain: the primary report is that founder John Neely Bryan named it for his "good friend Dallas." This person is variously reported as 1) George Mifflin Dallas, the eleventh vice president of the United States; 2) his brother, Alexander Junior, an American commodore; 3) their father, Alexander Senior, United States Secretary of the Treasury around the end of the War of 1812; or 4) some other person named Dallas whose identity is uncertain. Additionally, another report has the town being named Dallas as the result of a town-naming contest in 1842.
Decatur	Wise	Stephen Decatur, a Revolutionary War naval hero
Del Rio	Val Verde	Its location on the Rio Grande
Denton	Denton	Methodist preacher and Indian fighter John Bunyan Denton, who was killed in 1841 at the Battle of Village Creek
Dickens	Dickens	Its location in Dickens County, which was named for a J. Dickens who fought in the Battle of the Alamo
Dimmitt	Castro	W. C. Dimmitt, a land owner and developer
Dumas	Moore	Louis Dumas, president of the Panhandle Townsite Company in Sherman