Dictionary of Medieval Names
from European Sources

Sigwin m. Old High German sigu 'victory' + Old High German wini 'friend'.

The name of two 9th C dukes of Gascony.

Estonia
Middle Low German
1398 Zeghewyn BbRT p. 342
France
Latin
c823 Sigoinus (nom) irminon-vol2 5, Palatiolum; 1047x1061 Seguinus (nom) CartNDSaintes XX; 1067 Seguinus (nom) ibid. XII; 1147 Seguino (abl) clairvaux-12thc 14, Siguinus (nom) ibid. 16; 1163–64 Seguini (gen) ibid. 110, Seguinus (nom) ibid. 110; 1164 Seguini (gen) ibid. 121, Seguinus (nom) ibid. 121; 1179 Seguyni (gen) ibid. 176; 1310/11 Seguinus (nom) GasReg-A p. 100; 1310–11 Seguinus (nom) ibid. p. 236; 1378 Seguinus (nom) hanquetvol1 688
Middle French
1392 Seguin MemBret-II col. 606
Cite as: S.L. Uckelman. "Sigwin". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Sigwin.