A nickname for a leader could be boss, chief or head honcho.
national chair person.
The Leader; nickname for Hitler
Iowa's nickname is "The Hawkeye State". It is a tribute to Indian leader chief Black Hawk, leader of the native American Sauk tribe.
Moses in Hebrew is Moshe (משה) but he didn't have a nickname.
The leader of the National Party is Warren Truss
That was Ivan.
During the Civil War, the leader of the Underground Railroad was Harriet Tubman. A common nickname for Harriet Tubman was Moses.
The historical national hero or leader is José Gervasio Artigas.
The national chairperson
Gorby was a nickname given to Mikhail Gorbachev when he was leader of the USSR.
What are sandwiches made off