Definition that contains firstborn
- ninib a solar deity; firstborn of Bel and consort was Gula; god of war and the chase and agriculture; sometimes identified with biblical Nimrod
- ninurta a solar deity; firstborn of Bel and consort was Gula; god of war and the chase and agriculture; sometimes identified with biblical Nimrod
- fast of the firstborn (Judaism) a minor fast day on Nissan 14 that is observed only by firstborn males; it is observed on the day before Passover