Where does “Orlov” come from?

Orlov (English) comes from Russian Орлов, from Russian Орёл, from Old East Slavic орьлъ, from Proto-Slavic orьlъ, from Proto-Balto-Slavic *arélis, from Proto-Indo-European h₃érō — eagle.

Ancestry of “Orlov”, step by step

StepLanguageWordMeaning
1RussianОрлов—
2RussianОрёлAquila (constellation)
3Old East Slavicорьлъ—
4Proto-Slavicorьlъeagle
5Proto-Balto-Slavic*aréliseagle
6Proto-Indo-Europeanh₃érōeagle
Every word from Proto-Indo-European h₃érō →Every word from Proto-Balto-Slavic *arélis →Every word from Proto-Slavic orьlъ →