Perhaps you should try some spelling variations:
peteriov » petrov (Expand Search)
petroiv » peteroiv (Expand Search), petrioiv (Expand Search), petruoiv (Expand Search)
petruouiv » peteruouiv (Expand Search), petriuouiv (Expand Search), petruuouiv (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (Expand Search)
petriui » peteriui (Expand Search), petriiui (Expand Search), petruiui (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 (((petroiv OR petruouiv) OR (peteruiov OR peteriov)) OR ((petrui OR petriui) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petroiv OR petruouiv) OR (peteruiov OR peteriov)) OR ((petrui OR petriui) OR petr)) o.s.*".