Thiamis both a surname and a given name. Notable people with the name include:
Surname:
Abdoul Thiam (b. 1976), German footballerAkon (Aliaume Damala Badara Akon Thiam) (b. 1973), American singer and rapperAmy Mbacké Thiam (b. 1976), Senegalese athleteAugustin Thiam (b. 1952), Ivorian politicianBamba Thiam (b. 1985), Senegalese footballerBrahim Thiam (b. 1974), French-Malian footballerDoudou Thiam (1926–1999), Senegalese diplomat and politicianHabib Thiam (b. 1933), Senegalese politicianIba Der Thiam (b. 1937), Senegalese writer and historianIbrahima Thiam (b. 1981), Senegalese footballerKhaly Thiam (b. 1994), Senegalese footballerMamadou Thiam (b. 1995), Senegalese footballerMame Baba Thiam (b. 1992), Senegalese footballerMor Thiam (b. 1941), Senegalese drummerNafissatou Thiam (b. 1994), Belgian athletePablo Thiam (b. 1974), Guinean footballerSerigne Abdou Thiam (b. 1995), Qatari footballerTidjane Thiam (b. 1962), Ivorian businessman and politicianGiven name:
Gan Thiam Poh (b. 1963), Singaporean politician and businessmanTony Tan Lay Thiam (b. 1970), Singaporean politician and businessmanYap Thiam Hien (1913–1989), Indonesian human rights lawyerYeow Chai Thiam (1953–2016), Malaysian medical doctor and politician