Charlotte must have died – maybe when they were on their way to Texas, or walking to New Braunfels. He married Caroline Schulz in Comal County on July 18, 1847. They had a child, Wilhelmine, in about 1848. I found their marriage record online, as well as a couple of immigration records. One says he arrived in 1844, the other says 1845. His death record from the U. S. Census Mortality index is also available.
I did not have his birth or death dates, so your information helped me find all the rest.
Caroline remarried in November of 1850 to Wilhelm Fenske. They had several children, and she died in 1878, I believe.