Final answer:
The ZBT crest was designed by the brothers of the Zeta Beta Tau fraternity; however, specific details on the individual designer are not commonly available to the public.
Step-by-step explanation:
The ZBT crest was designed by the brothers of Zeta Beta Tau (ZBT), a fraternity originally formed as a Jewish Zionist organization but now open to all men regardless of religion. The crest is an emblem of the fraternity's values and history. Details of who specifically designed the crest or when it was created may be archived within the fraternity's historical documents; such information is usually not made public. The design likely reflects Zeta Beta Tau's symbols, mottos, and principles.