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Dictionary of Medieval Names
from European Sources

Lanselm m. Old High German lant, Old Saxon land 'land' + Old High German, Old Saxon helm 'helmet'.

France
Latin
c1140 Lanselmus (nom) CartNDdOurscamp XCVIII
Cite as: S.L. Uckelman. "Lanselm". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 3. http://dmnes.org/2015/3/name/Lanselm.