Ruut is a Dutch surname which is not very common in this spelling. It is pronounced the same way as 'Ruud' which is the short Dutch equivalent to Rudolph. In my case it's just 'Ruut' with no derivational abbreviation involved. Usually in Dutch, the name is used for males, but I have met a female 'Ruut' as well. The name means 'famous wolf';-) To get a clue of how the name sounds, try howtopronounce.com.
In Finland the name seems to be more common. An interesting example is Ruut DeMeo, a Baltimore singer songwriter and author from finnish descent.
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