Perhaps you should try some spelling variations:
peterow » petrow (Expand Search)
petr » petri (Expand Search), petru (Expand Search), petro (Expand Search)
petruo » petriuo (Expand Search), petruuo (Expand Search), petrouo (Expand Search), petru (Expand Search), petro (Expand Search)
petriuo » petriiuo (Expand Search), petruiuo (Expand Search), petroiuo (Expand Search)
petriui » petriiui (Expand Search), petruiui (Expand Search), petroiui (Expand Search)
petruuui » petriuuui (Expand Search), petruuuui (Expand Search), petrouuui (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 (((peterow OR (petr OR peter)) o) OR (((petruo OR petriuo) OR (petriui OR petruuui)) _)). s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((peterow OR (petr OR peter)) o) OR (((petruo OR petriuo) OR (petriui OR petruuui)) _)). s.*".