Thank you for your response.
The Hotek family appears to be from POTVOROV (W of Prague & N of Pilsen). In addition to Hotek, there are many other Hillsboro-Yuba familiar names in the cemetery there: Koukl, Picl, Sebranek, Heidenreich, Jansky, Sinkule, Urban, Havlik, Babor (Barbour), Benes (Benish)-- just to list the names I noticed. However,Brisky or its phonetic equivalents does not appear to be present there.
There is also a report that John Brisky had a sister, Mary [1846-1895], who married Matej Norwalk [1829-1902]-- however, that family has asked me for information about origin!
A search of the (on-line) Czech parish registers would be a logical next step, but so far I have not had enough patience to struggle through those hand-written records.