I have a large file of information on William Maxwell 1807-1862.  My wife is a descendent through his son William Stephen M.1833-1886.  Much of the family migrated to TX (Falls Co.,) about 1873.  Hugh Paul M. (1844) was brother of William Stephen M., they had another brother George Washington M. . Hugh had a Jr. that married Lucinda Talley.  G. W. and Hugh left Falls Co., and went to Erath Co.,   I think this is the family for which you are searching.  You can e-mail me for more information.