This is four years later, but I have been finding information about one of my Brokamp (Elisabeth--don't know birth date) who married a Johann Bernard Dyckhus in the Damme area circa 1803 or 1804.I don't know if she is a sister to your Johann Brokkamp but she was born probably circa 1780 +/-.
I am assuming that Brokkamp and Brokamp are probably the same if both are from Damme.Also the marriage I noted was in the St. Viktor Roman Catholic Church of Damme records.I don't have access to them, but obtained extracted information from Bryan Kercher who was looking for Dyckhues or Dyckhus family members--hence my interest. He had access to all the St. Viktor church records through the LDS Church Library.These were extensive records and I believe Bryan was looking for specific family names for birth, marriage and death records.My Maria Agnes Dyckhus born 1813 November 12 immigrated to the US (Cincinnati) with her mother and another sister.Another sister married a Enneking on May 1, 1827 in Damme and also immigrated.Both family units immigrated Spring of 1833. My Maria Agnes Dyckhus modified her name to Agnes Maria Dickhaus and married Joseph Kleine who was a community builder in Cincy (East Walnut Hills area) and ran a successful tailoring enterprise, utilizing other family and friends to build a large business in downtown Cincy.He founded the St. Francis de Sales Catholic Church with his brother and Francis Fortman.The church that now stands at Madison/MLK and Woodburn was dedicated circa 1878.I think many emmigrant parishioners came from the Damme area.My Agnes (nee Dyckhus) came from Dummerlohausen area or Oldorf, just east of Damme city.
If you are interested in the information that Bryan has, let me know and I will contact him for you.