WAhuizotl (mythology)
WAyakashi (yōkai)
WChamp (folklore)
WGigantic octopus
WIgopogo
WInkanyamba
WIssie
WKussie
WLagarfljót Worm
WLoch Ness Monster
WLukwata
WMemphre
WMonster of Lake Tota
WMugwump (folklore)
WMussie
WNahuelito
WNorth Shore Monster
WOgopogo
WPhaya Naga
WPluck Lake
WSelma (lake monster)
WStorsjöodjuret
WVarberg Fortress