IETERSDORF-KLASTEN, Gustav yon (e-ters-dorf), German explorer, born in Men Breisaeh in 1609; died in Cologne in 1669. He was descended from an ancient family of the Palatinate and served in the Bavarian army till 1634, when he became a Dominican monk, and was attached in the following year to the South American missions. He resided for twenty years in Hispaniola, Cuba, and other West Indian islands, was elected provincial of his order for the West Indian missions in 1649, and founded several colleges in Hispaniola. He went also to Guatemala as provincial in 1653, but was compelled three years later to return to Europe in broken health. After a few months he prepared to sail for America again, but his fatally opposed his departure, and he settled in Cologne, where he became a canon in the cathedral and devoted the remainder of his life to arranging his notes on America. He published "Lexicon Linguw Caraibae" (Cologne, 1659); "Grammatica Linguae Caraibae" (1661); "Gebrituche, Sitten und Producte yon Cuba, Hispaniola und einiger anderer West indischer Inseln, the original edition of which is very rare, one copy having brought at Didot's sale) "in Paris in 1853, $6,720 (1665); and "Relat Gestorum a primis ordinis Praedicatorum missionaries in insults Americanis, pnesertim apud Indige-nos quos Caraibes vulgo dicunt, ab anne 1635, ad annum 1653" (3 vols., 1768). The dictionary and the grammar of the idiom of the Caribs are yet considered as the most complete documents on the language of those people.