Dictionary of Medieval Names
from European Sources

Gilo m. A hypocoristic of any of various names beginning with Proto-Germanic *gailaz 'merry, excited; beautiful; lush, lustful'.

The name was sometimes used as a nickname of Gilbert, as in the 1271 example of Giselbertus dictus Gillo (hennes-vol1, 218), and is also often confused with Giles.

Belgium
Old French
1262 Gilon (obl) OvdFB 5
England
Walloon
1583 Gille RWC p. 6; 1590/1 Gille ibid. p. 15; 1592/3 Gille ibid. p. 25
France
Latin
1138x1162 Gilo (nom) clairvaux-12thc 63; 1147 Gilo (nom) ibid. 14; c1150 Gilonis (gen) CartNDdOurscamp CXIII; 1163 Gillonis (gen) clairvaux-12thc 99, Gilo (nom) ibid. 101; 1179 Gilo (nom) ibid. 180; 1231 Gilo (nom) NDParisII 2-CV; 1258 Gilo (nom) ArrestReg-volI XXVIII, Pentecost, Gilone (abl) ibid. XXVIII, Pentecost, Gilonem (acc) ibid. XXVIII, Pentecost; 1260 Gillo (acc) ibid. VIII, Ascension, Gilo (nom) ibid. X, St. Martin; 1261 Gilo (nom) ibid. IV, St. Martin, Gilone (abl) ibid. IV, St. Martin; 1301 Gilonis (gen) MemPic-vol17 p. 253
1376 Gilletus (nom) St-Barnard-Romans 383
Old French
1296 Gillo paris1296 p. 34
1301 Gillon (obl) MemPic-vol17 p. 233
Middle French
1388 Gille thierry
Germany
Latin
1267 Gillo (nom) hennes-vol1 208, Gilloni (dat) ibid. 208; 1271 Gillo (nom) ibid. 218, Gilone (abl) ibid. 218, Gylone (abl) ibid. 215; 1272 Gilone (abl) ibid. 222; 1273 Gilo (nom) ibid. 230; 1274 Gylo (nom) ibid. 234, Gylone (abl) ibid. 234; 1280 Gilo (nom) ibid. 268
Italy
Latin
1300 Gilonem (acc) ActDipVeneto-I-1 p. 47; 1367 Gilius (nom) Livi 178
Portugal
Latin
1211 Gil (nom) PHGCRP-I no. 6; 1217 Gil (nom) ibid. no. 21
Spain
Catalan
1510 Gil valencia1510 3450
Spanish
1495 Gil montalvo; 1575 Gil Catalogo-5.2 3795
Cite as: G. Grim, J. Uckelman, S.L. Uckelman. "Gilo". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Gilo.