I trust you are aware of Achion's Help Topic "How do I find the right church book?" - right?
www.archion.de
For the church district of Aurich is currently available:
www.archion.de
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Riepe has own church books since 1712
- for further details please see here:
kirchengemeindelexikon.de
Ostgrossefehn has own church books since 1890 and previously belonged to Aurich-Oldendorf
-for further details please see here:
kirchengemeindelexikon.de
Timmel (please note the different spelling) has own church books since 1699
-for further details please see here:
kirchengemeindelexikon.de
For Riepe exists an "Online - Ortsfamilienbuch" --- see here:
www.online-ofb.de
For Grossefehn and Timmel exist printed "Ortsfamilienbuecher" - for details you should contact the "Upstalsboom Gesellschaft"
www.upstalsboom.org
wiki.genealogy.net
wiki.genealogy.net
Further details see also here:
Onlineshop
shop.upstalsboom.org
Greetings, Vera