The name Diedrich is of German origin, derived from the Old High German word "theodoric," which means "ruler of the people." It has been used throughout history, most notably by the Ostrogothic king Theodoric the Great, who ruled Italy in the 6th century AD. In modern times, Diedrich is a rare but significant name, often associated with individuals who have made notable contributions to their respective fields.
The name Diedrich experienced a surge in popularity between 2006 and 2007 with six births recorded each year, following which it plateaued with five births per year until 2014. There was another spike in 2016 with six births. Over the span of these years, from 1992 to 2016, a total of thirty-two children named Diedrich were born.