Dictionary of Medieval Names
from European Sources

Styrbiorn m. Old Icelandic styrr 'tumult, uproar' + Old Icelandic bjǫrn 'bear'.

One Styrbiorn appears in 10th C Swedish legend as the name of a prince and hero; Lind argues that his name is in fact Biorn (cf. Berno) with a prepended byname styrr. However, the prototheme appears in other compounds, making it more likely that Styrbiorn is an ordinary dithematic Scandinavian name.

Sweden
Latin
1350 Styrbyorna (gen) SDHK no. 6010
Cite as: S.L. Uckelman. "Styrbiorn". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Styrbiorn.