Family name Casuga (Casuga 
) , all around the world, is quite a common cognomen. The cognomen Casuga is habitual in Philippines, where it is quite a rare surname, Qatar, and United Arab Emirates, where it is a rare surname. Measured by absolute frequency, it is commonest in Philippines, the United States, and Saudi Arabia.
| VARIANT | COUNTRY |
|---|---|
| Casuga | Saudi Arabia, United States, United Arab Emirates, Canada, Philippines |
| albert casuga Canadian poet, CA (b. 1943) |
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| iris casuga researcher |
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