- Meerbach surname is the same as Mirbach or Merbach. When one wrote this surname in documents, mistakes appeared. Also when surname was transliterated to cyrillic letters and back "Merbakh" writing is possible.
- Meerbachs originally were estonian peasants from Loewenwolde. It looks like all living estonian Meerbachs are relative. As I understand, Meerbach was likely nickname. Maybe it means "man who lived near lake or river".
Also there are Mirbachs from Lithuania and Germany. Nothing is known to me about their origins.