Where does “吉尼斯” come from?

吉尼斯 (Chinese) comes from English Guinness, from Irish Mac Aonghusa.

Ancestry of “吉尼斯”, step by step

Step	Language	Word	Meaning
1	English	Guinness	A serving of the beverage
2	Irish	Mac Aonghusa	—

吉尼斯 — Etymology, Origin & Word History | Etymology Explorer