Section of Brandenberg with many Kobersteins.  The counties (Kreis) with records for Kobersteins are in RED, click on these to go to the Genealogical data.

Large Map of Brandenburg

Not sure what Kreis these names are from

Friedrich Wilhlem Steinbert age 25 born in 1841 son of Johann Friedrich Steinberg married Hanna Charlotte Albertine Koberstein age 26 born in 1840 daughter of Johann Ludwig Koberstein on 1866 at Keller, Lindow, Mark, Brandenburg, Germany
Genealogy Society Indexes (Geneanet)
Last Name : STEINBERG
First Name : Friedrich Wilhelm
Gender : M
Type of record : Marriage
Father's name : STEINBERG
Father's First Name : Johann Friedrich
Gender of father : M
Date of Birth : Year 1841
Place of marriage : Keller, Lindow, Mark, Brandenburg, Germany
Date of Marriage : Year 1866
Age : 25
Spouse Last Name : KOBERSTEIN
Spouse First Name : Hanna Charlotte Albertine
Sex of Spouse : F
Spouse's date of birth : Year 1840
Age of spouse : 26
Spouse's Father : KOBERSTEIN
Spouse's Father First Name : Johann Ludwig
Gender of spouse's father : M