Ivan Jagsic (1886-1956), born as a Burgenland Croat in Austria, studied cartography, topography and geology in Zürich. As a professor of University of Cordoba, Argentina, he lectured also meteorology and astronomy, and wrote numerous scientific books. The South American Oceanographic Institute in Brazil was named after him.

Lucas Kraglievich (1886-1932) was distinguished Argentinean paleontologist of Croatian descent.