I'm researching the John Grings family found in Manitowoc Co., then in Milwaukee, Wisconsin beginning prior to 1860.
John Grings' [b. 1833] mother Marie Margaret Schmoll Krings [b. 1803, m. 1832], and maternal grandmother Margaret Schmoll, emigrated with my g-g-grandparents [Peter Oppermann/Barbara Dhein family] in 1853 to join John in Two Rivers, Manitowoc Co, WI. John's father Johann Nicholas Krings was likely deceased prior to their emigration.
John married before 1870, and moved his family to Milwaukee at about the same time, clearly maintaining a relationship with the Oppermann/Dhein family based on other records.
This Krings/Grings family can be found in online IGI records transcribed from Catholic sources from Beltheim, Rheinland.
I'm happy to correspond further about this family and it's connection to the Dhein, Schmoll, and Oppermann families.