DTB is an abbreviation for Doop-, Trouw- en Begraafboeken [Baptismal, marriage, and burial books]. Sometimes, you see it as DTBL where the L stands for lidmaten [members].
You may come across the term in publications, finding aids, research guides, or source citations.
Check this article for more Dutch genealogical abbreviations.
Baptismal record of Dorothea Smeulders
About Yvette HoitinkYvette Hoitink, CG®, QG™ is a professional genealogist in the Netherlands. She holds the Certified Genealogist credential from the Board for Certification of Genealogists and has a post-graduate diploma in Family and Local History from the University of Dundee. She has been doing genealogy for over 30 years and helps people from across the world find their ancestors in the Netherlands. Read about Yvette's professional genealogy services.
Yvette Hoitink, CG®, QG™ is a professional genealogist in the Netherlands who helps people find their Dutch ancestors. She is certified by the Board for Certification of Genealogists and has a post-graduate diploma in Family and Local History from the University of Dundee.
Do you need a genealogist in the Netherlands to help you with your research?
Please read what Yvette can do for you.
This Dutch Genealogy webinar gives you a great introduction to researching your Dutch ancestors. Requires a Legacy FamilyTreeWebinar subscription to watch. [Affiliate link]
Finally a clear definition of lidmaten. I searched and only found vague information, mostly about lists. Thank you very much Yvette.