Cognomen Ul-Haq (Ul-Haq 
) , in all the world, is quite a rare family name. The surname Ul-Haq is characteristic of United Arab Emirates, where it is a rare surname, the United Kingdom, and Pakistan. In absolute terms, the name is most common in Pakistan, the United Kingdom, and Indonesia. Parts of the name also exists independently as a last name Haq.
| VARIANT | COUNTRY |
|---|---|
| Ul-Haq | Pakistan, Saudi Arabia, United Kingdom, United Arab Emirates, Indonesia |
| amin ul-haq PK (b. 1950) |
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| munir ul-haq palaeontologist |
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| asad ul-haq researcher |
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| irfan ul-haq Ph.D. University of Alabama-Tuscaloosa 2002 |
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