von Wil·le·brand disease 
(vŏn wĭlə-brănd′, fôn vĭlə-bränt′)
(vŏn wĭlə-brănd′, fôn vĭlə-bränt′)n.
A usually genetic bleeding disorder caused a deficiency or an abnormality of a clotting factor that affects platelet adhesion.
[After Erik Adolf von Willebrand (1870-1949), Finnish physician.]