Swiss Mennonite History, covering emigration from Berne to the Palatinate, Alsace, Montbeliard and Volhynia, by the Swiss Mennonite Historical and Cultural Association. You can find related information on the emigration history and the settlement places also here (Judy Voran) and here (MSHC). If you are interested in the differences between Mennonite and Amish, this text from Goshen College gives some detailed information.
The Ellis Island Foundation holds
records for immigrants starting from ca. 1890. If you click on this
link, you can see a result list for searching the Eymann surname (and
The Cemetery Transcription Library has a list of transcribed epitaphs from tombstones. Here are the links for searching “Eyman” or “Eymann” against this list.