Which preposition to use with mckean

during Occurrences 1%

At Troy, a class had been organized by Brother McKean during the latter part of the former year.

of Occurrences 1%

What should we say, if Horace Greeley were to be arrested on a warrant issued by the Supreme Court of New York for a libel on Louis Napoleon, as was William Cobbett by Judge McKean of Pennsylvania for a libel on the King of Spain?

Which preposition to use with  mckean