Rosenberg

[ roh-zuh n-burg; for 1 also German roh-zuh n-berk ]
/ ˈroʊ zənˌbɜrg; for 1 also German ˈroʊ zənˌbɛrk /

noun

Alfred,1893–1946, German Nazi ideologist and political leader, born in Estonia.
Julius,1918–53, and his wife, Ethel Green·glass [green-glas, -glahs] /ˈgrinˌglæs, -ˌglɑs/, 1915–53, U.S. citizens executed for passing atomic-bomb secrets to the U.S.S.R.
a town in S Texas.

British Dictionary definitions for julius rosenberg

Rosenberg
/ (ˈrəʊzənbɜːɡ) /

noun

Alfred . 1893–1946, German Nazi politician and writer, who devised much of the racial ideology of Nazism: hanged for war crimes
Isaac . 1890–1918, British poet and painter, best known for his poems about life in the trenches during World War I: died in action
Julius . 1918–53, US spy, who, with his wife Ethel (1914–53), was executed for passing information about nuclear weapons to the Russians