Knights of St. John of Jerusalem
a member of the religious and military order (Knights Hospitalers or Knights of St. John of Jerusalem)
originating about the time of the first Crusade (1096–99) and taking its name
from a hospital at Jerusalem.
(lowercase) a person, especially a member of a religious order, devoted to the care of the sick or needy in hospitals.
Origin: 1350–1400; hospital
; replacing Middle English hospitalier
< Middle French
< Medieval Latin hospitālārius;