Mahathir or Mahdzir () can be a given name, a middle name, or a patronymic. Notable people with the name include:
Given name Mahathir Azeman (born 1996), Singaporean football midfielder Mahdzir Khalid (born 1960), Malaysian politician and teacher Mahathir Mohamad (born 1925), Malaysian politician
Middle name Azrul Mahathir Aziz, Malaysian politician
Patronymic Marina Mahathir, Malaysian activist and writer Mokhzani Mahathir, Malaysian businessman Mukhriz Mahathir, Malaysian politician and businessman Zara Qairina Mahathir (died 2025), Malaysian secondary school student
See also Mahathero in Bengali