Perhaps you should try some spelling variations:
perv » per (Expand Search)
petrov » petruv (Expand Search), peterov (Expand Search), petruov (Expand Search), perov (Expand Search)
petro » petru (Expand Search), petero (Expand Search), petruo (Expand Search), pero (Expand Search)
peterui » peterdi (Expand Search)
petruo » peteruo (Expand Search), petruuo (Expand Search), peruo (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), peri (Expand Search)
petrui » peterui (Expand Search), petruui (Expand Search), perui (Expand Search)
petr » peter (Expand Search), petru (Expand Search), per (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: fop (perv OR (petrov OR (((petro OR petruo) OR (petri OR (petrui OR peterui))) OR petr))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (perv OR (petrov OR (((petro OR petruo) OR (petri OR (petrui OR peterui))) OR petr))) o.s.*".