The story
- Proto-Celtic · derived from*tarwos“bull”
- Latin · derived fromTarvodubron
- Old Norse · derived fromÞórsá“Thor's River”
- English todayThurso
From Old Norse Þórsá (“Thor's River”). The Norse is likely an adaptation of the Latin Tarvodubron from a Proto-Brythonic reflex of Proto-Celtic *tarwos (“bull”) + *dubros (“water”).
Words from the same roots
Proto-Celtic*tarwos all →
Tarvos
Etymology from Wiktionary, CC BY-SA 4.0.