Thorsten (Thorstein, Torstein, Torsten) is a Scandinavian given name. The Old Norse name was Þórsteinn. It is a compound of the theonym Þór (Thor) and steinn "stone", which became Thor and sten in Old Danish and Old Swedish. The name is one of a group of Old Norse names containing the theonym Thor, besides other such as Þórarin, Þórhall, Þórkell, Þórfinnr, Þórvald, Þórvarðr, Þórolf, most of which, however, do not survive as modern names given with any frequency. The name is attested in medieval Iceland, e.g. Þorsteinn rauður Ólafsson (c.
https://en.wikipedia.org/wiki/Thorsten