萨得 is a phonetic transliteration of foreign names like Sade or Saad. It is variant of the more common
萨德 (Sàdé), which also famously transliterates the US anti-ballistic missile system THAAD (Terminal High Altitude Area Defense). The Marquis de Sade is rendered as
萨德侯爵 (Sàdé Hóujué).
