The story
Compare archaic German Feuerburg and Dutch vuurberg, and various synonymous constructions in other languages (e.g. Mandarin 火山 (huǒshān, “fire mountain”), Arabic جَبَلُ النَّار (jabalu n-nār, “mountain of fire”), Norman montangne dé feu (“mountain of fire”)).
Etymology from Wiktionary, CC BY-SA 4.0.