I've just started researching this family but am told by my mother, who mailed him one of her wedding announcements in 1943, that Frederick Wohlfarth was the brother of my great-grandfather, John Caspar Wohlfarth. If so, he was supposedly born June 19, 1856 in Watchung, NJ, son of Christian Frederick Wohlfarth, orig. of Wachbach, Wuerttenburg, Ger., and Catherine Adrienne Brissel, a native of Darmstadt, Ger. They were supposed to have married in Watchung, NJ, 1848. If you have any information about him--i.e. death date, name of spouse, children, schooling, etc.--I would greatly appreciate it.