Dictionary of Medieval Names
from European Sources

Boguslav m. Slavic bog, bóg, boh, boż 'rich; a god' + Slavic sława, slava 'glory, fame'.

Czech Republic
Latin
1337 Bohuzlai (gen) Rössler1 29; 1350 Bohuslaus (nom) chlumecky 162; 1351 Bohuslaum (acc) ibid. 45; 1353 Bohuslao (abl) ibid. 60; 1358 Bohuslaus (nom) ibid. 227, p. 31
Middle High German
c1339 Bohusslai (gen) Rössler1 93, Busslaw (nom) ibid. 93; 1360 Bohuslaus (nom) ibid. 57; 1361 Busslaw (nom) ibid. 82; 1373 Busslaw (nom) ibid. 102
Poland
Latin
1228 Boguslaus (nom) hennes-vol1 p. 81
Cite as: S.L. Uckelman. "Boguslav". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Boguslav.