Researching Nüsse (Nuesse) Descendants

In researching my relatives I have concentrated on descendants of Conrad Heinrich Gustav Nüsse, b:1829 d: 1900 (commonly known as Gustav) who arrived in the USA in October 1854 and raised two families in the Milwaukee WI area. I continue to seek information on his descendants.

However, two brothers remained in Germany:

Heinrich Adolph Christian Nüsse, b: Mar 21, 1833 in Lauenau
and
Henrich Christian Ludwig (Louis) Nüsse, b: Aug 12, 1837 in Lauenau;

In April 1900, he and his wife Alwine Sophie (nee)Becker,b: 1845 lived at the address: Hannover, Grasweg 12 B, Gernania, Germany. They had one son Adolph Nüsse, born about 1862; son Adolph may have been living in Berlin with occupation: "banking".

I am seeking any information that might help identify and locate descendants of the brothers.

Your help and suggestions would be greatly appreciated.

Dave Nuesse