Last name Alwinus (Alwinus 
) , across the world, is an extremely rare cognomen. The surname Alwinus is habitual in Southern Asia, particularly India, where it is an extremely rare surname. Much more prevalently, Alwinus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Alwinus | Germany, Indonesia, South Africa, Tanzania, India |
Muir, Kusamila, and Arumaithurai