BEIRUT—Lebanon named its ambassador to Germany as the country’s next primary minister, an appointment that is unlikely to placate protesters who have sought a comprehensive overhaul of the nation’s leadership adhering to the deadly Beirut explosion.

Mustapha Adib was requested by President Michel Aoun to form a new govt, the point out-operate Nationwide Information Company noted Monday, owning secured the backing of a vast majority of lawmakers and many former primary ministers, like Saad Hariri and Najib Mikati.