Gar Tongtsen Yulsung (Tibetan: མགར་སྟོང་བཙན་ཡུལ་སྲུང༌།, Wylie: mgar stong btsan yul srung; Chinese: 噶爾·東贊域松; 590-667) was a general of the Tibetan Empire who served as Lönchen during the reign of Songtsen Gampo. In many Chinese records, his name was given as Lù Dōngzàn (Chinese: 祿東贊) or Lùn Dōngzàn (Chinese: 論東贊); both are attempts to transliterate the short form of his title and name, Lön Tongtsen.