I too am interested in the Ahlers name. I have tracked my family to Wittmund in 18220s and Leer about 1800. Prior to that, it appears they came from Oldenberg.
Herausgegaben von der Upstalboom - Gesellschaft fuer historiche Personenforschung und
Bevoelkerungsgeschichte in Ostfriesland e .V.
95 Ahlers, Ferdinand Carl 105. Gerichts Schreiber, * (1772) im Herzogtum Oldenberg
+ 14./19.01.1816 (45) Leer (Brustkrankheit), oo 22.04.1803 Leer (31/23), Ihlen, Lena
7515 * (1780) im Groningerland
Die Familien der evangelisch-reformierten Kirchengemeinde Leer (1601 - 1900)
352 Ahlers, Ferdinand Karel, geboren te Detesdorf in't Oldenburgsche en wonende alheir,
procl. [JM.30 / JD.23} 27, Maerz 1803 Leer, oo bye Lena Jhlen, geb: op't Hogezand
in Groningerland en womende alheir
As I interpret these entries, Ferdinand was born in Oldenburg, moved to Leer and married Lena. But I know little about the family in Oldenburg except that Ferdinand's father was named Juergen Diederich Ahlers.
Can anyone help? Is, or was, there a Detesdorf in Oldenburg Duchy? Any advice about where I should be looking?
Thanks
Stan Ahlers