Surname Karl-August (Karl-August 
) , all over the world, is an extremely rare family name. The last name Karl-August is characteristic of Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. Much more prevalently, Karl-August is the forename as well as the last name. Parts of the name also exists independently as a first name Karl, and a first name August.
Lux, Lübke, Jensen, Thiele, Hansen, Höltke, Faller, Ohlsen, Wiesel, Müller, Möller, Santore, Schulte, Schmidt, Skarnek, Krenzer, Plotzky, Lübcke, Ullrich, Siepelmeyer, Sprenger, Engelsen, Lipper, Riebel, Peters, Bremer, Mohr, Kock, Groh, Lenz, Menke, Meyer, Brons, Rohde, Drude, Geest, Schreiber, Lehis, Heise, Vater, Weber, Menson, Stanke, Starke, Schulz, Arnold, Conrad, Cordes, Eggen, and Schröder