Yamyam (born Abdulkadir Hersi Siyad, 4 September 1946 – October 22, 2005) (Somali: Cabdiqaadir Xirsi Siyaad (Yamyam), Arabic: "??? ???? ??? ???? "?????) or Yam Yam was a Somali poet and playwright.
Yamyam was one of the main contributors for the Somali National Academy of Culture (SNAC), also known as the Somali National Academy of Arts, Sciences and Literature.
He was active as a poet from the 1960s.There is no one consistent English translation of his name.
Alternative spellings include Cabdulqaadir or Cabdilqaadir Xirsi.