Anna Ovena Hoyer (born: Anke Hanß, aka Anna Ovena Hoyers, Swedish: Anna Orena Höijer) (Koldenbüttel on Ejdersted peninsula 1584 – 27 November 1655) was a writer and poet, originally German; active in Sweden from 1632.
North Sea tides reached as far as Hollingstedt, so larger vessels were able to navigate the river, until a dam at Koldenbüttel closed off the Treene in 1570.
Wilhelm Karl Hartwich (or Hartwig) Peters (April 22, 1815 in Koldenbüttel - April 20, 1883) was a German naturalist and explorer.