There are a number of uses for the term Ati:

• In Polynesian mythology (specifically: Maori), Ati (mythology) is a chief who caught and married a Menehune.
• Ati (tribe) is an indigenous tribe of Negritos on the island of Panay in the Philippines.
• Ati, Chad is a town in Chad
• ATI Technologies Inc. is a major supplier of PC graphics processors.