Hello Joe,
the name PREIS can be found in Munich, for example in the district AUBING
and in the district ALLACH
If you want you may look here - but I don`t think that this helps at the
moment
http://www.genealogie-kiening.de/AB/BREIS.HTM
spelling-variations are: Breis, Prei?, Preis, Preiss
on www.genealogie-kiening.de you also can find some Jocham - but not yours.
I?m sorry I can`t help at the moment, as I?m leaving tomorrow for a school
trip for some days.
At the moment I can`t say where to search in Munich without any knowledge of
the district or parish.
What to search is no question - as usual you need a birth-record, the
marriage certificate of the parents, if possible the death certificate and
so on - birth certificate of the parents, marriage, death etc.
Best whishes
Christine