Family name Jajczay (Jajczay 
) , throughout the world, is a very rare cognomen. The last name Jajczay is characteristic of Hungary, where it is a very rare surname, Canada, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jajczay | Hungary, Canada, United States |
| jajczay jános HU (b. 1892) |
|