Last name meaning Ferris: This is an Anglicization of the Old Gaelic name O' Fearghusa - a compound of the Gaelic O (meaning grandson or male descendant) and the personal name Fergus, composed of the elements fear - a man and gus - vigour or force...
At other times, a confluence can be the location where two smaller streams or rivers merge to become the source for a new river. This is the case in Pittsburgh, Pennsylvania, where the Monongahela River and Allegheny River merge to create the Ohio River.
As tributaries join main stems at confluence after confluence, rivers become larger. Eventually, nearly all rivers do lead to another body of water, usually an ocean, a bay, or a large lake. The transition point between a river and these other bodies of water is known as a delta.