Cognomen Folster (Folster 
) , in all the world, is quite a rare last name. The last name Folster is habitual in Canada, where it is a rare surname, New Zealand, and Brazil. Measured by absolute frequency, the name is most common in Brazil, the United States, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Folster | Germany, Canada, Brazil, New Zealand, United States |
| william folster Australian politician, AU (b. 1894) |
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| natalie folster doctoral candidate at the London School of Economics and Political Science |
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| carlton p folster researcher (ORCID 0000-0002-3620-7076) |
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