Standard transliteration of 'Alvin'.
阿 (ā) gives the 'al-' onset,
尔 (ěr) the 'r' colour,
文 (wén) the '-vin' tail (Mandarin has no 'v', so 'w-' substitutes). Best-known bearers: futurist Alvin Toffler (《
未来的冲击》Future Shock), and the cartoon chipmunk Alvin from 《
鼠来宝》.