August Kościesza-Żaba (1801, in Krāslava – 3 January 1894, in İzmir), from coat of arms of Kościesza, was a Polish orientalist and diplomatist in Russian service.
He studied Eastern languages in Saint Petersburg, Russia (1824–1828).
August Kościesza-Żaba was researching habits, literature and language of Kurdish people and in 1861, published results in French language paper Receueil des notices et récits de la littérature et des tribus du Kourdistan.
He is also an author of Dictionnaire kurde-français, the first French-Kurdish dictionary (1879).
This biographical article about a historian from Poland is a stub.