Where does “Adrian” come from?

Adrian (German) comes from Latin Hadrianus, from Latin -anus, from Latin -um, from Proto-Italic *-om, from Proto-Indo-European *-oHom.

Ancestry of “Adrian”, step by step

StepLanguageWordMeaning
1LatinHadrianus{{w|Hadrian}}; from the Roman harbor Hadria
2Latin-anusOf or pertaining to; -ian
3Latin-umnominative neuter singular of -us; accusative...
4Proto-Italic*-om—
5Proto-Indo-European*-oHom—
Every word from Proto-Indo-European *-oHom →Every word from Latin -um →Every word from Latin -anus →