Dictionary of Medieval Names
from European Sources

Jaroslava f. Slavic Jarilo, the name of a god of vegetation, fertility, and springtime, from Proto-Slavic *jaro, *jarъ, *jarь, *jara 'spring (season)' + Slavic sława, slava 'glory, fame'.

Czech Republic
Latin
1358 Jarcze (dat) chlumecky 341, p. 35, Jarka (nom) ibid. 413, p. 37
Cite as: S.L. Uckelman. "Jaroslava". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Jaroslava.