I suspect that there are some on this list who know specifically where to look to determine what religion was predominant in the Swiss community whence came your ancestors. I believe the two major possibilities back then are Protestant Calvinist (Reformierte) and Catholic (Katolische). When my anscestors moved from Baetterkinden (near Bern) to Gondelheim, Baden-Wuerttemburg, Germany in 1690's there was only one church there, Lutheran (Evangelische). They attended the Evangelische church and for all ordinance/event entries in the parish book, the word "Reformiert" was included. This happened for two to four generations before they stopped considering themselves to not be Evangelische. I've notice that in both Germany and in Pennsylvania, if the community was small and had only one church, Reformierte and Evangelische (Reformed and Lutheran) German speaking immigrants attended together. Sometimes the church was called Reformed, other times Lutheran, and sometimes it was openly named something like Union. For example, Philadelphia had both churches but Reamstown had only the combined. Today, many protestants, even those that still believe in specific doctrines, feel comfortable switching churches, based on where they live, where their friends' children attend, where the sermon is over in time for a round of golf, where the sermon is better etc. Practicallity and convenience were factors back then too. I doubt a German speaking Lutheran or Reformed, upon arriving in Texas, considered attending with the Methodists was a "conversion". It was a convenience to attend with other protestants. So the answer, if your ancestors came from a protestant (most likely Reformed) area in Switzerland and moved to a place where there were other German speaking immigrants, they would most likely end up in the Reformed church if there was one nearby and the Lutheran church if there wasn't, and another protestant sect if neither Reformed or Lutheran was available. In Chicago, look for a nearby Reformed parish. In Poedunk, look for the nearest protestant church. If they came as Catholics, they would seek out a Catholic church. I've seen cases where protestant bachelor arrived and married a Catholic girl and attended the Catholic church and vice versa. It comes down to the fact that you're going to have to do a little research. That's what genealogy is all about. That's why it's fun and mentally/spiritually rewarding. Paul