Thamer or Thamir is a masculine given name of Arabic origin. Notable people with the name include:
Given name Thamer Thamer Kamal Ali (born 1988), Qatari middle-distance runner Thamer Chaim (born 1945), Brazilian weightlifter Thamer Enad (born 1970), Kuwait football manager Thamer Nayef al-Hathal (born 1973), Iraqi politician Thamer Jamal (born 1990), Sudanese footballer Thamer Al-Khaibari (born 2005), Saudi Arabian football player Thamer Al-Meshauqeh (born 1991), Saudi Arabian footballer Thamer Mohammed (born 1984), Emirati footballer Thamer Ali Sabah Al-Salem Al-Sabah (born 1972), Kuwaiti politician Thamer Al-Sabhan (born 1967), Saudi Arabian politician Thamer Shaker (born 1975), Saudi businessman Thamer Yousif (born 1953), Iraqi and ethnic Assyrian football player
Thamir Thamir Ghadhban (born 1945), Iraqi politician Thamir bin Abdulaziz Al Saud (1937–1958), Saudi royal
Middle name Hamad bin Thamer Al Thani, Qatari royal and businessman