Answer:
Persians: a native or inhabitant of ancient or modern Persia (or Iran), or a person of Persian descent
Arabs: to those who originate from an Arab country, whose native language is Arabic: this contrasts with the narrower traditional definition which referred to the descendants of the Tribes Of the Arabian Peninsula.
Kurds: Kurds or Kurdish people are an Iranic ethnic group native to a mountainous region of Western Asia known as Kurdistan, which spans southeastern Turkey, northwestern Iran, northern Iraq, and northern Syria.