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Last name Gayn (Gain
, Gayn
, Gagn
) , worldwide, is a widespread cognomen. The family name Gayn is characteristic of India, where it is quite a common surname, Bangladesh, where it is quite a rare surname, and Qatar. Measured by absolute frequency, it is the most numerous in India, Bangladesh, and France. Very seldom, Gayn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gain | Bangladesh, Philippines, India, France, United States |
| Gayn | Iraq, Canada, Philippines, India, United States |
| Gagn | Canada, India, France, United States, Democratic Republic of the Congo |
| Гайн | Belarus, Kazakhstan, Russia, Ukraine |