Bergsten rhymes with:
ellingsen, ellingson, gregson, hemmingsen, hemmingson, henningsen, hughson, kingsun, ludvigsen, ludvigson, salvigsen, seligson
Bergsten sounds like:
bergstein, berstein, bifurcation, boorstin, bragdon, braughton, braxton, breakdown, breighton, briggstone, brighten, brightman, brighton, brockton, brogden, brogdon, brookstone, broughton, broxton, burstein, burston