When Herman Hinrich Johann Tietje (born 7 Mar 1835) and his wife, Catharina Maria Schwiebert (born 20 Oct 1840), decided to immigrate to America with their family, two of their older children chose to remain behind as they were already married with children and had jobs in Germany.
the father of Wilhelm (Dutch Bill, husband to Kate Spoering) and
Dietrich's brother, Heinrich, stayed in Germany where they raised their
families. Heinrich, the younger brother of the two, was Kerstin, my German correspondent's, great-great grandfather.