Where does “Milan” come from?

Milan (Polish) comes from Old East Slavic милъ, from Proto-Slavic milъ, from Proto-Balto-Slavic meiʔlos, from Proto-Indo-European meyl-.

Ancestry of “Milan”, step by step

StepLanguageWordMeaning
1Old East Slavicмилъdear, sweet
2Proto-Slavicmilъdear, nice, gentle, mild, soft, pleasant, polite
3Proto-Balto-Slavicmeiʔlos—
4Proto-Indo-Europeanmeyl-—
Every word from Proto-Indo-European meyl- →Every word from Proto-Balto-Slavic meiʔlos →Every word from Proto-Slavic milъ →