Complex sentence: Her uncle was Bruce Haldeman, President of the company that published Colonel Henry Watterson's (also known as Marse Henry) Louisville Courier-Journal and her grandfather, Colonel W. A. Milton, was Secretary-Treasurer of the company.
Split into simpler sentences: Her uncle was Bruce Haldeman, President of the company that published Colonel Henry Watterson's (also known as Marse Henry) Louisville Courier-Journal. Her grandfather, Colonel W. A. Milton, was Secretary-Treasurer of the company.