At the age 16 Adolph emigrated to New York City to assist his brothers, Julius and Leonard Lewisohn with the family's mercantile business, Adolph Lewisohn & Son which was named for his father.
Adolph and Leonard Lewisohn were German Jews whose father had established in 1858 an American subsidiary, Lewisohn Brothers, which bought and sold bristles, feathers, hair, metals, and wood.
He was born in 1872 to Leonard Lewisohn and he had the following siblings: Walter Lewisohn, Frederick Lewisohn, Oscar Lewisohn (1884–1917), Lillie A. Lewisohn, Alice Lewisohn, and Irene Lewisohn.
Leonard Lewisohn (1847–1902), mining magnate, banker, philanthropist; older brother of Adolph Lewisohn
Leonard Bernstein | Leonard Compagno | Leonard Cohen | Leonard Nimoy | Sugar Ray Leonard | Elmore Leonard | Mark Lewisohn | Leonard Wood | Leonard Slatkin | Leonard Rose | Leonard Woolf | Leonard French | Leonard Feather | Fort Leonard Wood | Leonard | Nicolas Léonard Sadi Carnot | Leonard of Noblac | Leonard Adleman | Leonard Woolley | Leonard P. Guarente | Leonard Cheshire | Fort Leonard Wood, Missouri | St Leonard | Sheldon Leonard | Leonard Rossiter | Leonard M. Miller School of Medicine | Jacques Léonard | Fort Leonard Wood (military base) | Steve Leonard | Leonard Trelawny Hobhouse |