Meaning and Name Origin
Decatur \d(e)-ca-tur\ as a boys' name. Surname. There is a process called "decating" in the manufacture of cloth. Deca- in Greek means "ten", but might also mean "pure". Stephen Decatur was an early 19th-century naval hero. There are several American towns named for him.
Decatur is an uncommonly occurring given name for men but a very prominent surname for both adults and children (#29122 out of 88799, Top 33%). (2000 U.S. Census)
Shown below is the birth name popularity of Decatur for boys. Decatur has yet to be listed in the Top 1000 so far. (2014 Birth Statistics)