Friderici - Friederici - Fredericks

In my files I found two members Friederici, maybe related to the Friderici-Fredericks. Both are sons from a Joseph Friederici (* abt. 1812 in ... , + 1895 in Münden). His profession was "shears sharpener". I have translated this word from the german "Scherenschleifer". Münden is a city close to Hannover, today "Hannoversch-Münden". From both sons I haven't any more info. Somebody think, that there is a possibility to find out something or maybe some descendants ?
.........................................................
Heinrich Friederici,
* abt. 1851 in Münden, + ...
oo Anna Holz, * ... , + ...
1 son is known:
Franz Carl Friederici,
* 20.07.1884 in Newark, Essex, New Jersey, + ...
......................................................................................
Franz Friederici, * abt. 1853 in Münden, + ...
1872 from Bremen to Southampton (England) and New York (USA).
......................................................................
I forgot the sister:
Louise Friederici, * abt. 1840 in Münden, + ...
1860 to Cincinnati in USA.
......................................................................................
I don't know, why they choose different destinations in USA.
I'll appreciate any help.
Kind regards from Santiago de Chile
Georg
....................................