google
ref
mid 19th century: from German, from Äther ‘ether’ + -yl.
wiktionary
ref
From German Ethyl, from Ether + -yl.
etymonline
ref
ethyl (n.)
1838, from German ethyl (Liebig, 1834), from ether + -yl. Ethyl alcohol, under other names, was widely used in medicine by 13c.
