In the past, HMWK has been called HMWK-kallikrein factor, Flaujeac factor (1975), Fitzgerald factor (1975), and Williams-Fitzgerald-Flaujeac factor, - the eponyms being for people first reported to have HMWK deficiency.
No pasado o HMWK fora chamado factor HMWK-calicreína, factor de Flaujeac (1975), factor de Fitzgerald (1975), e factor de Williams-Fitzgerald-Flaujeac, epónimos de persoas nas que primeiro se observou a deficiencia de HMWK.