My husband family of Ahrens came to Davenport in the early 1850s from Mecklenburg,Germany. Here is what we know. Mary Ahrens, nee Meyer, wife of Joachim Henry Ahrens, was born 9/25/1797. In 1827 she was united with Joachim Henry Ahrens in matrimony, this union was blessed with six children. She died 3/28/1895 near Dumont, Ia-Butler county at the age of 97yrs. This was taken from an obituary. Her son Henry was born 9/25/1828, he married Louise Dahl in 1853.In 1854 they came to Dumont,Ia., from Davenport.Their children were: Theodore, James, William and George. From a second marriage to Beate Waldeck, children were Beate and Elizabeth. Perhaps your ancestor was a brother to Henry or son of Mary & Joachim??