Note 10 — THE SLEEPER AND THE WAKER.[1]
Richard Francis Burton translation · Edition 2
The ’Allámah (doctissimus) Sayce (p. 212, Comparative Philology, London, Trübner, 1885) goes far back for Khalifah = a deputy, a successor. He begins with the Semitic (Hebrew ?) root “Khaliph” = to change, exchange: hence “Khaleph” = agio. From this the Greeks got their κόλλυβος and Cicero his “Collybus,” a money-lender.