This is the name of a service club founded in 1915.
The name is supposedly from a Native American word meaning “to make oneself known,” but this is highly debated. Every source I found said “allegedly” before the definition.
There is a “Kiwanis Avenue” in Sioux Falls. I did some searching for Kiwanis as a street name, but didn’t find anything else. Perhaps that’s just specific to Sioux Falls.