Cognomen 忠杉 (忠杉 
) , all around the world, is a very rare last name. The family name 忠杉 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, 忠杉 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 忠杉 | China |