Family name Olaso (Olaso 
) , across the world, is quite a common cognomen. The last name Olaso is characteristic of Uruguay, where it is quite a rare surname, Philippines, and Paraguay. Measured by absolute frequency, it is the most numerous in Philippines, Spain, and Uruguay. Much less frequently, Olaso is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Olaso | Philippines, Argentina, Spain, United States, Uruguay |
| miguel vélez de ulibarri olaso (b. 1654) |
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| gregorio zabalza olaso Spanish politician, ES (b. 1829) |
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luis olaso Spanish footballer (1900-1981), ES (b. 1900) |
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| gabino olaso zabala Spanish presbyter, ES (b. 1869) |
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| cipriano olaso ES (b. 1868) |
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| alfonso olaso Spanish football player (1905-1937), ES (b. 1905) |
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xabier olaso Basque writer, ES (b. 1964) |
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| ezequiel de olaso AR (b. 1932) |
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| claudia olaso Uruguayan visual artist (1962-2019), UY (b. 1962) |
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| robert olaso researcher |
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| juan ramon gonzalez olaso Spanish politician |
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| ximena ferrer olaso performing artist in Canada |
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| guillermo olaso Spanish tennis player, ES (b. 1988) |
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| martin ruiz olaso |
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| josep bresó olaso |
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