Where does “Taiwan” come from?

Taiwan (Portuguese) comes from English Taiwan, from Chinese Mandarin 臺灣, from Hokkien 臺灣.

Ancestry of “Taiwan”, step by step

Step	Language	Word	Meaning
1	English	Taiwan	—
2	Chinese Mandarin	臺灣	—
3	Hokkien	臺灣	—

Taiwan — Etymology, Origin & Word History | Etymology Explorer