The settlement in the valley
Derived from Old English elements 'dal' meaning valley and 'tun' meaning settlement or town. It originally served as a habitational surname for families living in such locations before transitioning into use as a given name.
Less common today
Dolton isn't in the latest US Top 1000. It last peaked at #3,588 in 1995.
A character in the animated series Β· The Legend of Korra
US births per 5-year period, 1990βpresent (SSA data).