[jmorse2]

Biblical sources describe tin as being sourced from Tarshish [0], a remote island that traded with the Phoenician naval merchants in Tyre. Plus as wtracz' sibling comment indicates there's a potential Phoenician connection with Cornwall, it isn't especially unlikely.

[0] https://www.blueletterbible.org/esv/eze/27/12/s_829012

[narag]

Tarsis is thought to be refering to Cádiz in Spain. Cádiz was founded by phoenicians (if you visit, make sure to check the archeological museum [0]) to trade with the lost kingdom of Tartessos.

Tartessos is placed in the Guadalquivir estuary by Rufus Festus Avienus' Ora Maritima, but its exact location is unknown. There are some efforts to pinpoint it using satellite images, because its ruins could be buried under the sand.

https://www.visit-andalucia.com/one_post.php?id=111