Last name Gaelen (Gaelen 
) , worldwide, is a rare cognomen. The last name Gaelen is characteristic of Belgium, where it is a rare surname, Netherlands, and New Zealand, where it is a very rare surname. Measured by absolute frequency, it is commonest in Netherlands, Belgium, and the United States. More prevalently, Gaelen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gaelen | Netherlands, Belgium, Canada, Australia, United States |
| alexander van gaelen Dutch painter, NL (b. 1670) |
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| pieter van gaelen researcher |
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