Perhaps you should try some spelling variations:
peteru » peter (Expand Search), petru (Expand Search), peters (Expand Search)
petrov » petro (Expand Search), peterov (Expand Search), petruov (Expand Search), petroov (Expand Search)
petroiv » peteroiv (Expand Search), petruoiv (Expand Search), petrooiv (Expand Search)
petris » peteris (Expand Search), petruis (Expand Search), petrois (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 ((peteriov OR petroiv) OR (peteru OR ((petrov OR petris) OR ((petr OR petri) OR per)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteriov OR petroiv) OR (peteru OR ((petrov OR petris) OR ((petr OR petri) OR per)))) o.s.*".