Which preposition to use with schwerin

of Occurrences 1%

What is your name?" He said: "I am the Baron von"it sounded like "Hossfer"and, in any case, to that name, care of General de Schwerin of the Seventh Division, I shall mail this book.

on Occurrences 1%

To the Senate of the United States: I herewith communicate to the Senate, for its consideration, a declaration of the Government of the Grand Duchy of Mecklenburg-Schwerin, bearing date at the city of Schwerin on the 9th December, 1847, acceding substantially to the stipulations of our treaty of commerce and navigation with Hanover of the 10th June, 1846.

Which preposition to use with  schwerin