Grodel - Niner Connection

Passenger list of 10-1-1840 Germany to Baltimore, Maryland. George Nich GRODEL 42, with Barbara, Frederick and Tophan (a name often translated as John).

On the 1850 census of Allegheny Co., PA Niners and Krodel/Grodle/Crodle are living next to each other and in the Krodel home is Geor N., Barbara, Frederick and Tophan. In the Niner home is Henry,Margaret and two children named George.

1860 Census of Venango Co., PA showing in the home of Henry Nynor/Nyner : Henry 43, Margaret 43, George Grothel 17, George Nynor 14, Fred Nyner 12, Barbara 10, Margaret 8, Georgiana 6, Wm 4.

Questions:
Are the two families related?
Was Margaret married to a Huner and her maiden name Krodel? Or a Huner who then married a Krodel?
Was Barbara perhaps related to Margaret>
Was it merely happenstance of location, fellow Germans befriending other Germans and a family taking in a child after the death of the parents?