1701 as a typeface, from old + English. It was used to meaning "the Anglo-Saxon language before the Conquest, old-fashioned or archaic English" in a c. 1200 account of the native (as opposed to Latin) month names, but the modern linguistic use is from 19c. (see Middle English).
-ol
-ola
Olaf
Olbers' paradox
old
Old English
old hat
old maid
olde
olden
old-fashioned