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I am trying to find records for Bergisch Gladbach for the 1900 to 1910 period.
I am on the hunt for a family name Dohm
hans@dohm.com if you know of any researcher looking for work.
Based on their extensive data collection in this special German area, I trust they will be able to help.
As an aside: in case your ancestors were of Roman-Catholic religious belief, Archion‘s holdings will not be helpful at all. In the vast majority of cases it only provides Evangelical church register records.