1. Nestor (Greek mythology) a wise old counselor to the Greeks at Troy
  2. Nestorianism the theological doctrine (named after Nestorius) that Christ is both the son of God and the man Jesus (which is opposed to Roman Catholic doctrine that Christ is fully God)
  3. Nestorian relating to Nestorius or Nestorianism
  4. Nestorius Syrian who was a Christian bishop and Patriarch of Constantinople in the early fifth century; one of the major heresies concerning the doctrine of the hypostasis of Christ was named after him (died in 451)
  5. Nestorian Church a Christian Church in the Middle East that followed Nestorianism; there is still a small Nestorian Church in Iraq
  6. Nestor notabilis large brownish-green New Zealand parrot
  7. Nestor Paz Zamora Commission a terrorist organization in Bolivia that acts as an umbrella for numerous small indigenous subversive groups; a revival of a group with Marxist-Leninist ideologies originally established by Che Guevara in the 1960s