Daggers Missing from 21 Ceremonial Daggers (XBOX)

I cannot find the following daggers in Pulura’s Fall; the wights that should drop them are nowhere to be found:

Ajb the Sweet-Voiced - Drops from Wight near Stone Tree
Afjne Bloody Spear - Drops from Wight near Cliff climb
Fiahn the Ore Master - Drops from Wight near Stone Tree
Gweirn the She-Wolf - Drops from Wight near Cliff climb