The word "Willebrand" refers to a specific person, a Finnish physician named Erik von Willebrand. He is famous for discovering a condition known as von Willebrand disease, which is a bleeding disorder.
In medical contexts, you might refer to "Willebrand" in discussions about specific treatments or studies related to the disease he identified.
"Willebrand" is a term that celebrates the contributions of a physician to the understanding of blood disorders.