We don't really know the origin of the name Wailly. Place-names in France were subject to intensive research during the 19th century. Wailly didn't escape the investigations. Here are some hypotheses: • From Monsieur Harbaville,
Wailly is from the Latin
vallis, (French : vallon. Eng: little valley) • R. Rodière judged this hypothesis probable, given the geographical position of the village.
Walliacum, is
Galliacum, caused by mutation of
W to
G. 'Gallus ->Gaullois, Wailly being a border village of Picardy and therefore, of France. • According to L. Ricouart,
Wailliacum, a little ford • In the ''Cueilloir de l'Hôtel-Dieu de Montreuil (15th-century manuscript)
, in the article entitled Wailly'',there's a curious drawing of a dog that is barking
Wail, wail. The changing spellings of the name
Wailly : • 11th-12th century - Uali,
Codex traditionum Sancti georgii Hisdiniensis.' • 1239 - Walliacum, listed as a member of the commune of
Saint-Josse sur Mer. • 1240 - Walli, - as above. • 1251 - Velleia, Local map. • 1311 - Wailli,
Fiefdom of Maintenay. • 1475 - Wailly, ''Cueilloir de l'Hôtel-Dieu de Montreuil''. • 1495 - Vuailly,
Terrier de la commanderie de Loison. • 15th century - Census of Wally, ''Carte de l'
Artois de J. S. Montensi''. • 1656 - Ouailly, • 1709 - Wailli, - Map by N. de Fer: ''Les environs de Boulogne, d'Etaple, de Montreuil, de Montulin, de Rue, et d'Hêdin''. • Around 1750 - Vuailly, in a Catholic Register. • End of 18th century - Wailly, on
Cassini Maps • 1901 - Wailly became Wailly-Beaucamp (Beaucamp, an adjoining hamlet) ==History==