John Wellborn Root, Jr.

John Wellborn Root, Jr. (1887–1963) was a significant United States architect based in Chicago. He was the son of architect John Wellborn Root. As a young man, he graduated from Cornell University and studied architecture at Paris' École nationale supérieure des Beaux-Arts, where he became friends with John Augur Holabird, the son of another famous Chicago architect. Root returned to the States and joined his friend on the architectural staff at Holabird & Roche in 1919.

from: http://en.wikipedia.org/wiki/John_Wellborn_Root,_Jr.