Where does “Ostrovanu” come from?

Ostrovanu (Romanian) comes from Romanian Ostrovu, from Romanian ostrov, from Proto-Slavic ostrovъ, from Proto-Indo-European strow-.

Ancestry of “Ostrovanu”, step by step

StepLanguageWordMeaning
1RomanianOstrovu—
2Romanianostrovait; island
3Proto-Slavicostrovъstreamlined; river island; island
4Proto-Indo-Europeanstrow-—
Every word from Proto-Indo-European strow- →Every word from Proto-Slavic ostrovъ →Every word from Romanian ostrov →