Business Registration Act Article 28

No business may use a business name that is identical to that of another registered business in the same municipality directly under the jurisdiction of the Executive Yuan or the county (city) except that:1. a business which has been legally registered originally has an identical business name with other businesses due to the adjustment of administrative jurisdiction.2. a business establishes a branch with marks that clearly identify it is a branch in another municipality directly under the jurisdiction of the Executive Yuan or the county (city).The name of a business shall not include the word "corporation".The business name and nature of business to be conducted by the business shall be applied for approval prior to business registration. Such business name shall be reserved for a certain period of time and can not be used by other businesses. The regulation governing the application procedure, registration of business name and nature of business to be conduct by the business, reserved period and other compliances shall be prescribed by the central competent authority.
中文原文 商業登記法第28條
商業在同一直轄市或縣(市),不得使用與已登記之商業相同之名稱。
但有下列情形者,不在此限:
一、原已合法登記之商業,因行政區域調整,致與其他商業之名稱相同。
二、增設分支機構於他直轄市或縣(市),附記足以表示其為分支機構之明確字樣。
商業之名稱,不得使用公司字樣。
商業名稱及所營業務,於商業登記前,應先申請核准,並保留商業名稱於一定期間內,不得為其他商業使用;其申請程序、商業名稱與所營業務之記載方式、保留期間及其他應遵行事項之準則,由中央主管機關定之。

English translation for reference only; the Chinese text prevails. Not legal advice.