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Dictionary of Medieval Names
from European Sources

Velislav m. Slavic veli 'great, more, large' + Slavic sława, slava 'glory, fame'.

See also Wenceslas.

Czech Republic
Latin
1349 Velislaus (nom) chlumecky 14
Cite as: S.L. Uckelman. "Velislav". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 2. http://dmnes.org/2015/2/name/Velislav.