Family name Estornell (Estornell 
) , worldwide, is a rare last name. The family name Estornell is habitual in Spain, where it is a rare surname, Argentina, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, Estornell is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Estornell | United States, United Kingdom, Argentina, Spain |
| j. estornell researcher ORCID ID = 0000-0003-0854-5358 |
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| gloria castellano estornell researcher ORCID ID = 0000-0001-7284-880X |
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| yaquelin estornell Cuban amateur wrestler, CU (b. 1984) |
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