Reiter

Reiter is a German-language surname derived from the occupation of a horse rider. The word Reiter literally means rider, originating from the German verb reiten, to ride. As a surname, it has appeared in German-speaking regions and in communities abroad where German heritage has had influence.

In medical history, the name is associated with Reiter's syndrome, the historical term for a form of reactive arthritis. The condition was first described in the early 20th century by the German physician Hans Reiter, whose later involvement with the Nazi regime led to discomfort with the eponym. Because of these associations, the term Reiter's syndrome has largely fallen out of favor in modern medical literature, with the preferred designation reactive arthritis used instead. Reactive arthritis is an inflammatory arthritis that can follow certain infections and may involve the eyes and urinary tract.

Beyond its use as a surname, Reiter may also appear in geographic or institutional names reflecting German heritage, though such uses are less common as a standalone term. The name remains present in genealogical and onomastic contexts, where it is studied as part of Germanic naming traditions.

See also: Reactive arthritis.