On June 3, 1837, he married the writer Katharina Theresa Halein, not completely of his own free will, but under threat of suicide.
As a member of the Frankfurt parliament, Franz played a respected role on the far left, and as the head of the militia in Mainz he was highly esteemed and trusted by the people of that town.
He sported a remarkably full and unkempt beard during the 1849 uprising, and when it failed, toward the end of that year, he emigrated to America, settling in New York as a notary, a partner in the firm Kapp, Zitz and Fröbel.
[1] When amnesty was offered, he returned to Europe and died in Munich.
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