Küüsu
Küüsu is a surname of Estonian origin. It is not a common surname, and its exact etymology is not widely documented. However, it is believed to be a derivative of a given name or a word related to the natural environment in Estonia.
Estonian surnames often have origins in given names, patronymics, occupational terms, or descriptions of physical characteristics
As with many surnames, individuals bearing the Küüsu name are spread across Estonia and may have emigrated