I certainly hope there is a connection. My great grandfather's name was Carl Louis Friedrich born in Oelze in 1866. In the church records I have the youngest child is Alwin Edmund born in 1884 but there is another son born in 1870 named Heinrigh Albert Richard Friedrich.
In 1959 I lived in Irvington and visited the butcher shop on Stuyvesant Ave. many times.
Please let me know if this is the same meat market.
I am so glad to hear from you, I have been trying to connect with the Friedrichs for some time.