Surname Shammai (Shammai 
, שמאי) , in the world, is a very rare last name. The surname Shammai is characteristic of Israel, where it is a very rare surname, Nigeria, where it is an extremely rare surname, and the United Kingdom. Not in comparison with a country's population, this name is the most popular in Nigeria, the United States, and the United Kingdom. More prevalently, Shammai is the forename as well as the last name.