Where does “Gaianus” come from?

Gaianus (Latin) comes from Latin gaius, from Proto-Italic *Gāwjos, from Proto-Indo-European geh₂w- — to rejoice.

Ancestry of “Gaianus”, step by step

StepLanguageWordMeaning
1Latingaiusjaybird
2Proto-Italic*Gāwjos—
3Proto-Indo-Europeangeh₂w-to rejoice

Words derived from “Gaianus”

Every word from Proto-Indo-European geh₂w- →Every word from Proto-Italic *Gāwjos →Every word from Latin gaius →