阿蒂 is a phonetic transliteration:
阿 (ā) approximates the 'Ar-' opening (or short 'A-') and
蒂 (dì) catches '-tie / -di / -ty'. Used for names like Artie/Arty (Glee's Artie Abrams), Adi, or short forms of names beginning with 'Art-'. The
阿- prefix also doubles as Chinese kinship-style nickname marker, giving it a familiar tone.
