It was my understanding that the Willmert brothers came to the USA about the time each was about to be 18. They wanted to aviod conscription in the German Army.
The family story is that the brothers were working in a field and a local dignitary came riding by. They asked his advice whether to emigrate to Russia or USA. He advised USA.
I have some pictures of Willmerts.
Ludwig C.(Christian) Willmert+ Justine Meinke
William Willmert + Otillie Pasche
Gustave Willmert + Sophia Dreblow
Amil Carl Willmert + Louise Bursak
I will have to look further in my files for other Information.