Across the world, Larreátegui (Larreátegui 
) is an extremely rare unknown gender first name. Predominantly, Larreátegui is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Larreátegui | Spain, Peru, Ecuador |
Larreategui, Reategui, and Reátegui
| doña maria de la soledad bernaldo de quirós y colón de larreátegui 6 Jun 1810 - 6 Jun 1857 (b. 1810) |
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| doña maria domingo bernaldo de quirós y colón de larreátegui 8 Jan 1816 - 22 Aug 1884 (b. 1816) |
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| doña josefa gabriela paz de la serna y colón de toledo y larreátegui |
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