We wanted a Finnish name for our son that wasn't so common and would sound masculine in English, so names like "Antti" and "Matti" wouldn't do. We chose Kauko.
I was disappointed we couldn't call our boy Myrsky! In our case we wanted a name that would be easy to read/spell/pronounce for Finnish and British people. I think that might have been a stretch too far. Still Oiva is excellent, and works really well for everyone.
We considered Ukko for a minute, but ... wow, English speakers would definitely have struggles.