Surname Dayyo (Dayyo 
) , throughout the world, is a very rare cognomen. The cognomen Dayyo is habitual in Tanzania, where it is a very rare surname, Philippines, and the United States, where it is an extremely rare surname. Much less frequently, Dayyo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dayyo | Tanzania, India, United States, Philippines |