DNA project for descendants of the German colonists in the Planer Colonies near Mariupol on the Sea of Azov (Russian Empire, 1823–1943), whose ancestors came from West Prussia, and of the neighbouring and daughter colonies. The project accompanies the Planer Colonies Project (www.planerkolonien.de), which documents the families on the basis of church records and censuses. We collect Y-DNA, mtDNA and Family Finder results to identify the colonist lines, verify paper genealogies and connect relatives worldwide. More than 570 surnames from the 1858 census are listed on the project website. Everyone who descends from these families is welcome to join. DNA-Projekt für Nachfahren der deutschen Kolonisten in den Planer-Kolonien bei Mariupol am Asowschen Meer (1823–1943), deren Vorfahren aus Westpreußen kamen, sowie der Nachbar- und Tochterkolonien. Das Projekt begleitet das Planer Colonies Project (www.planerkolonien.de). Wer von diesen Familien abstammt, ist herzlich eingeladen mitzumachen.