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Last name Giangregorio (Giangregorio
) , in the entire world, is quite a rare surname. The last name Giangregorio is habitual in Italy, where it is quite a rare surname, Luxembourg, and South Korea, where it is a rare surname. Measured by absolute frequency, it is commonest in Italy, the United States, and South Korea. Much less frequently, Giangregorio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Giangregorio | South Korea, United States, France, Italy, Canada |