Jadir Morgenstern (born 29 May 1974), or simply Jadir (), is a football manager and former player who is the manager of Brazilian club Toledo U19.
Born in Brazil, Jadir is of Lebanese descent; he represented Lebanon internationally at the 2000 AFC Asian Cup as a centre-back.
Jadir started his professional career at Toledo, being sold to Atlético Paranaense for the 1993 Campeonato Brasileiro Série A in which his team was relegated. After spending another year at Furacão, he spent the next years being loaned to lower clubs. In 1996, he won the Campeonato Mato-Grossense with Mixto, playing in the final. In 1998, playing for Tubarão, he won the Copa Santa Catarina.
In 2000, he moved to Lebanese club Al-Ansar, later being naturalized and making his debut for Lebanon later in the year. He spent the rest of his career at the Asian country, except for a brief spell at Juventude-MT, playing also for Hekmeh FC and Akhaa Ahli Aley before ending his career at Al-Ansar.
Jadir represented Lebanon at the 2000 AFC Asian Cup and the World Cup 2002 Qualifying.
Jadir coaches the Toledo under-19 team, a position he holds since 2014.
Jadir's brother, Jorge, was also a professional footballer having played most for Paraná-based clubs. Jadir has a son, Adriel, who also plays football.