WordNet sense 1 (a unit of magnetic flux equal to 100,000,000 maxwells):

Wb

WordNet sense 2 (German physicist and brother of E. H. Weber; noted for his studies of terrestrial magnetism (1804-1891)):

Wilhelm Eduard Weber

WordNet sense 3 (United States abstract painter (born in Russia) (1881-1961)):

Max Weber

WordNet sense 4 (German conductor and composer of romantic operas (1786-1826)):

Baron Karl Maria Friedrich Ernst von Weber, Carl Maria von Weber

WordNet sense 5 (German physiologist who studied sensory responses to stimuli and is considered the father of psychophysics (1795-1878)):

E. H. Weber, Ernst Heinrich Weber