Phonetic transliteration: 瑞 (ruì, 'auspicious') for 'Re-/Ri-', 格 (gé, 'pattern/grid') for the trailing '-g' (gh). Same 瑞 syllable is used in 瑞士 'Switzerland' and 瑞典 'Sweden' — it's a go-to character for foreign names because it sounds nice.
culture
Used in Chinese subtitles for various names — e.g. Reg (a Lethal Weapon character Riggs gets clipped to), or simply when the source name has 'Re-' + a 'g' coda. Without context this transliteration is generic.
