Perhaps you should try some spelling variations:
petroiov » petrov (Expand Search), peteroiov (Expand Search), petruoiov (Expand Search), petrooiov (Expand Search)
petroiiv » petrov (Expand Search), peteroiiv (Expand Search), petruoiiv (Expand Search), petrooiiv (Expand Search)
petriv » peteriv (Expand Search), petruiv (Expand Search), petroiv (Expand Search)
petrouiiiv » peterouiiiv (Expand Search), petruouiiiv (Expand Search), petroouiiiv (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (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 (((petroiov OR peterov) OR (petriv OR (petroiiv OR petrouiiiv))) OR (petri OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petroiov OR peterov) OR (petriv OR (petroiiv OR petrouiiiv))) OR (petri OR petr)) o.s.*".