Birth Name: Daniel James Harmon
Place of Birth: Milwaukee, Wisconsin, U.S.
Date of Birth: January 3, 1973
Ethnicity: German, Polish, possibly other
Dan Harmon is an American writer, producer, actor, rapper, and podcaster. He is the creator and producer of the shows Community and Rick and Morty and creator and host of the podcast Harmontown.
Dan is the son of Fay and Robert Harmon.
Dan’s maternal grandfather was named Frederick Emil “Freddy” Rieck (the son of Fred/Frederick Eugene Rieck and Marie/Mary, or Viola Dietrich). Dan’s grandfather Frederick was born in Wisconsin. Dan’s great-grandfather Fred was born in Iowa, the son of Louis Joseph Rieck, whose parents were German, and of Kathrine/Katherine Sophie Schulmeister, whose parents were also German. Marie was born in Illinois.
Dan’s maternal grandmother was Marian Helen Thieman (the daughter of Clarence George Thieman and Helen Choinski). Marian was born in Wisconsin. Clarence was born in Wisconsin, the son of Clarence Thieman/Thiemann, whose parents were German, and of Marie/Maria/Mary Katherine Klapperich, whose parents were also German. Dan’s great-grandmother Helen was born in Wisconsin, to Polish parents, Joseph Ted Choinski and Constance F. Krajewski.
Source: Obituary of Dan’s maternal grandmother, Marian Helen (Thieman) Rieck – http://www.pkfuneralhomes.com