I am looking for more information about the following family.

TONEJES JOHNSON/JANSSEN was born 19 Jan 1833 in Extum, Ostfriesland, Germany, and died 17 Mar 1918 in Titonka, Kossuth county, IA.

He married MELTA SUIT 1860 in Extum, Ostfriesland, Germany. She was born 05 Jan 1831 in Extum, Ostfriesland, Germany, and died 23 May 1910 in German township, Kossuth county, IA.

Immigration: 1867, Attended the Reformed Church

Children are:
GEESKE b. 1859, Extum, Ostfriesland, Germany.
JOANNA b. 12 May 1862, Germany; d. 23 Mar 1955, Kossuth county, IA.
GERTRUT b. 12 Sep 1863, Extum, Ostfriesland, Germany; d. 11 Jul 1947, Iowa.
HERMENA b. Aug 1866, Extum, Oestfriesland, Germany; d. Bet. 1870 - 1880.

Does anyone know the closest Reformed church to Extum?

Extum is today a part of the city of Aurich, Ostfriesland. They have had for a long time only one protestant church, the Lamberti Church. Their Parish Office is:_

Ev.-luth. Lamberti-Kirchengemeinde Aurich
Lambertshof 2
26603 Aurich
Germany

Phone +49 (4941) 22 39

Mail: kg.lamberti.aurich@evlka.de
Web: http://www.aurich-lamberti.de/

I would try the Ostfriesen mailing list. They are a very helpful group and someone there will likely have a lot of information for you.

http://lists.rootsweb.ancestry.com/index/intl/DEU/OSTFRIESEN...