Words at Play : Words With Remarkable Origins, Vol. 2
The richness of espresso topped with frothy milk might not suggest a Catholic order devoted to poverty, but there's a connection between cappuccino and the Capuchin monks.
Members of that austere 16th century order wore a notably long and pointy hood, called a capuche. This earned them first the nickname, and then the formal name, Capuchin.
The brown shade of that hood inspired the name of the coffee drink around the turn of the 20th century.