Looking for a town in Germany-Poland (circa 1868-1882) Kronow

My grandparents were married (1868) and lived in Kronow until they immigrated to the USA in 1881. Based on verified information that I have, it would have been in "Germany-Poland" in the area from Gdansk as far south as Posan (now Poznan). I cannot find a record or location of this town. Where should I look?

There are several places called Kronowo
pl.m.wikipedia.org/wiki/Kronowo

I guess all of them would have been in the Prussian partition.

Some records from one of these places are indexed here
geneteka.genealodzy.pl/index.php?op=gt&lang=pol&bdm=B&w=14wm&rid=2272&search_lastname=&search_name=&search_lastname2=&search_name2=&from_date=&to_date=

There are two or three places called Kronowo. in Warmia-Mazury. They are south-east of Gdańsk and were part of Germany in that period. Kronow sounds like a (official then) German rendering. One was called Kronau before 1945, the others I'm not sure about.