Dietmar is a German name of Old High German origin, composed of the elements 'thiod' meaning 'people' and 'mar' meaning 'famous'. It was borne by several historical figures, including Dietmar von Aist, a 12th-century Minnesinger, or troubadour. The name fell out of fashion in Germany after the Middle Ages but has seen some revival in recent decades.
"Dietmar was quite popular in 1958 and 1964, with a total of 11 children bearing the name born during these years."