8 FAM 403.1-3(C)
a. ICAO standards require that names be written in a Latin alphabet.
b. If the applicant's name includes characters from non-Latin alphabets, e.g., Cyrillic letters, you must correct the name using Latin characters based on the applicant's citizenship evidence, ID, Permanent Resident Card (PRC), or U.S. visa in accordance with 8 FAM 403.1-2
Paul Fitzpatrick Russell 本来就是 Mgr. Russell 唯一的正式名称,Mgr. Russell国籍为美国,并无中华民国国民身分,依该国规定需用拉丁字母登记为正式名称,而Mgr. Russell 在美及在梵谛冈登记的唯一的正式名称是Paul Fitzpatrick Russell,而非陆思道,陆思道是单国玺神父私下给予他中文名,而非美国法律上的正式名称。至于非合法姓名你爱取几个都随便你,但那不能用于涉及法律行为的正式场合。例如陈喆可以有笔名琼瑶,田馥甄可以有艺名Hebe,但是她们不可以用琼瑶、Hebe去领选票、开户。