Amke was the daughter of Ulrich Eden Claaßen and his wife Almuth Engelken Harms. There is some discrepancy about her birth date. Her grave marker says she was born on Sep 6th, but her transcribed birth record, found online, says she was born on the 7th. This record was originally found in the Westerholt parish register according to the website.

Amke married Röttger Galts Decker in the parsonage of Westerholt , November 3,1844. Here is what the original Westerhold Church record says:

Den 3. Nov. wurde Röttger Galts Decker, 20 Jahre, Arbeiter zu Narp, sweiter Sohn des Arbeiters Gottfried Wilken Decker un dessen Ehefrau Hiemke Röttgers zu Narp, mit Amke Claaßen, 21 Jahre, einsige Tochter des Arbeiters Ulrich Eden Claaßen un dessen Ehefrau Almuth Engelken zu Eversmeer, in der Pastorei zu Westerholt copuliert. (1844)

Translation:
On November 3rd 1844, 20 year old Röttger Galts Decker, a worker of Narp and second son of the worker Gottfried Wilken Decker and his wife Hiemke Röttgers of Narp, married Amke Claaßen, 21 year old only daughter of the worker Ulrich Eden Classen and his wife Almuth Engelken of Eversmeer at the pastor's home in Westerholt.
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Röttger and Amke had nine children: Hiemke Maria; Ulrich Eden Freese; Gottfried Röttger; Almuth Engelken; Hauke Wina; Stientje; Antje; Magrace; William Rhinehart. After marriage Röttger and Amke lived in Eversmeer, a small village in Lower Saxony, which is located in the Northwest area of what is now Germany. The German Empire was founded in 1871 in the aftermath of three successful wars by the North German state of Prussia. It is possible Röttger was somehow involved in the fighting. There is a photo of him wearing some type of uniform.

They immigrated from Bremen, Germany to New York on the ship Eider and arrived on March 28, 1885. They settled in the German community of Bowman, Texas and began farming. They lived there the rest of their lives.