臺員/臺圓: (historical) Tayoan (peninsula near present-day Tainan, Taiwan, as well as Taiwan itself)
Usage notes
In isolation, the character "灣" is usually read as "oan" (e.g., 海灣). The reading of "oân" here is an exception stemming from the historical variants 臺員 and 臺圓, properly read as "Tâi-oân".