It sounds like the family you are looking for is some descendant of Hugh Thomas Caven and Mary Jane Walker. This is because Mary Jane is a 3rd cousin of Samuel L Clemens (Mark Twain ie Tom Sawyer) and that is where the Sawyer came from.With the ages you gave Mary Jane Walker and Hugh Thomas Caven would be grandparents of your Winefred Sawyer Caven. When posting it is much easier to follow up if you use dates and locations, for all I know you may be talking about a family in China. My Cavens Were in Kentucky, Iowa, Washington State, California and Wisconsin.
Here is a link to my family tree page with Hugh Thomas Caven's Family.