Perhaps you should try some spelling variations:
petrw » petrow (Expand Search), petru (Expand Search), petro (Expand Search), peterw (Expand Search), petruw (Expand Search)
peterw » peter (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petriov » peteriov (Expand Search), petruiov (Expand Search), petroiov (Expand Search), petrov (Expand Search)
petruv » peteruv (Expand Search), petruuv (Expand Search), petrouv (Expand Search), petru (Expand Search), petrov (Expand Search)
peters » peter (Expand Search), petersen (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((petrw OR peterw) OR (petr OR petri)) o) OR ((peters OR (petriov OR petruv)) _)). s.~".
• Adding a wildcard symbol may retrieve word variants: fop ((((petrw OR peterw) OR (petr OR petri)) o) OR ((peters OR (petriov OR petruv)) _)). s.*.