Four-syllable sound-only transliteration:
德 for 'dra-' onset,
拉 for the liquid '-ra-',
古 for '-gu-',
班 for '-ban'.
德拉 is a frequent opening pair for European names beginning 'dra-' or 'de la-' (e.g.
德拉克罗瓦 Delacroix). None of the characters carry meaning here.