Veela hair is a material from the head of a Veela that can be used to comprise the core of a wand. Veela hair is also used for some potions.
Since Britain's chief wandmaker, Garrick Ollivander, finds that Veela hair cores make for "temperamental" wands, it is likely that there are few Veela hair wands made in Britain. Since the only known Veela hair wand is from France, it is likely that there is a wandmaker from central Europe, possibly Gregorovitch, who uses Veela hairs as the cores in his wands.
It is possible that Gabrielle Delacour, sister of Fleur, also owns a Veela hair wand, since it is probable that her grandmother was willing to donate another hair for Gabrielle just as she did for Fleur.
It is possible that Apolline Delacour, mother of Fleur and Gabrielle, also possesses a Veela hair wand since it is likely that her mother was willing to donate a hair for her as well.
The only known donor of Veela hair is Fleur Delacour's grandmother, a full Veela, who gave hair to Fleur, and possibly Gabrielle and Apolline as well.
Behind the scenes
In Slavic mythology, some legends claim that if even one of a Veela's hairs is plucked, she will either die or be forced to change into a non-human shape.