波纳 (Bōnà) is a phonetic rendering of Western names like Bona, Bonner, or Bonar —
波 supplies the 'Bo-' and
纳 the '-na/-ner'. Note also Chinese film studio
博纳影业 (Bona Film Group), which uses the homophonous
博纳 instead. Mainland subtitle standard for the surname Bonner is usually
邦纳.