Page "Raisio" Paragraph 2

The name Raisio was originally given to its river, Raisionjoki.

The earliest form of the river's name is Raisajoki, meaning " marsh / bog river ", and etymological evidence of this can be seen in the Estonian word raisnik, meaning " peatland meadow ".

Another theory behind the etymology of the name Raisio is that it comes from the word raiskio, meaning a forest that's been damaged by poor foresting, because the Raisio landscape was changed due to sloughs and post-glacial rebound after the Ice Age.