sentences:  Mortimer Lieberman (Lee Mortimer) was the eldest son of Nathan and Rose Lieberman, first generation immigrants to the United States.Nathan Lieberman was born October 12, 1873 in Ukraine and emigrated in 1890, taking employment with Sears, Roebuck & Company, and later, Montgomery Ward, selling clothing.In 1918, Nathan Lieberman was employed by Kahn Tailoring Company in Chicago.