Cognomen Montorio (Montorio 
) , in the world, is quite a rare last name. The surname Montorio is habitual in Philippines, where it is quite a rare surname, Italy, and Spain, where it is a rare surname. Very seldom, Montorio is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Montorio | Italy, Spain, Philippines, United States, France |
| pietro francesco montorio apostolic nuncio, IT (b. 1556) |
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| guido roncalli di montorio IT (b. 1890) |
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bego montorio ES (b. 1959) |
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| josé manuel montorio gonzalvo ES (b. 1921) |
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| giorgio montorio Italian comics artist, IT (b. 1940) |
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| daniela montorio researcher |
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| giovanni rinaldi montorio 16th-century Roman Catholic bishop |
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| lucie montorio researcher |
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| bernardino callini de montorio Roman Catholic bishop |
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