Why The Name Sinnissippi?

The Rock River winds 155 miles through northwestern Illinois and is one of the main tributaries to the Mississippi River. It flows south through Rockford, then southwest across northwestern Illinois, passing Oregon, Dixon and Rock Falls before joining the Mississippi at Rock Island.
Along the fertile banks of the Rock River a large tribe of American Indians, called the Sauk, made their home. These Native Americans named the river Sinnissippi or in our language, rocky water.
The Rock River runs through the upper part of the association, hence, we get our name Sinnissippi Baptist Association.