Mocha
late 18th century: named after Mocha, a port in Yemen on the Red Sea, from where the coffee and leather were first shipped.
wiktionary
From Mocha, Yemen, a port on the Red Sea, from Arabic اَلْمُخَا (al-muḵā), due to its being a major marketplace for coffee during Ottoman rule.
The beans often had a chocolaty flavor, hence by extension came to refer to any coffee with a chocolate flavor, or any mixture of coffee and chocolate flavors, notably coffee with chocolate syrup added.
etymonline
mocha (n.)
1773, "fine coffee," properly that produced in Yemen, from Mocha, Red Sea port of Yemen from which coffee was exported (the beans themselves grew further inland). Meaning "mixture of coffee and chocolate" is recorded by 1849. As a commercial name for a shade of dark brown, it is attested from 1895.
