A son of Lebanese musical icons, Mr. Rahbani became one himself, with satirical critiques of his country’s dysfunction that melded Arab and Western music.

Although no official day of national mourning was declared, the magnitude of Rahbani’s influence was reflected in the presence of high-profile figures, including First Lady Nehmat Aoun, Deputy Speaker Elias Bou Saab, and Randa Berri, wife of Speaker Nabih Berri, who offered condolences to his mother, legendary Lebanese singer Fairuz.