Where does “arcadán” come from?

arcadán (Irish) comes from Irish arc, from Old Irish orc, from Proto-Celtic ɸorkos, from Proto-Indo-European pórḱos, from Proto-Indo-European perḱ-, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “arcadán”, step by step

StepLanguageWordMeaning
1Irisharcpiglet; diminutive animal or person; arc
2Old Irishorcpiglet
3Proto-Celticɸorkospork, piglet
4Proto-Indo-Europeanpórḱospiglet
5Proto-Indo-Europeanperḱ-colored; motley; to open, rip up
6Proto-Indo-Europeanper-before, in front; first; to go through
7Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Indo-European perḱ-