Surname Yenkai (Yenkai 
) , all over the world, is a very rare cognomen. The family name Yenkai is habitual in Thailand, where it is a very rare surname, Malaysia, where it is an extremely rare surname, and the United States. More prevalently, Yenkai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yenkai | Philippines, Malaysia, Taiwan, United States, Thailand |