Dictionary of Medieval Names
from European Sources

Zemislav m. Slavic s(i)em, z(i)em 'family, land' + Slavic sława, slava 'glory, fame'.

Czech Republic
Latin
1354 Zemislaus (nom) chlumecky 57
Cite as: S.L. Uckelman. "Zemislav". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Zemislav.