Where does “Bolcán” come from?

Bolcán (Irish) comes from Latin Vulcanus, from Etruscan Velchans.

Ancestry of “Bolcán”, step by step

Step	Language	Word	Meaning
1	Latin	Vulcanus	Vulcan, god of fire and forging; Vulcan, the...
2	Etruscan	Velchans	—