Family name 紫笃 (紫笃 
) , in all the world, is a very rare cognomen. The family name 紫笃 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 紫笃 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 紫笃 | China |