Phonetic transliteration of 'Philo' / 'Filo'. 菲 (fēi) covers the 'fi-/phi-' sound; 洛 (luò) is one of Chinese's standard syllables for foreign '-lo' endings (also used in 洛杉矶 'Los Angeles' and 洛克 'Locke'/'Rock').
culture
Most often refers to characters in foreign film/TV — e.g. Philo Vance (the 1920s detective novels and films), or Philo Beddoe (Clint Eastwood's character in 'Every Which Way But Loose'). Also appears as a surname/given name.