出典:Wiktionary
Late 20th century, from the Hanyu Pinyin romanization of the Mandarin 北竿 (Běigān), reinforced by Tongyong Pinyin.
With respect to the township specifically, likely: 2000s, from Mandarin 北竿 (Běigān) Tongyong Pinyin[1] romanization: Běigan, reinforced by Hanyu Pinyin.
Beigan