Mellissa: I found some records on both David Jefts of Mason, NH. The first David Jefts was born on 4 Jun 1776 in Mason. His father was John Jefts, brother of Benjamin. Benjamin's son David was born 7 Aug 1780 in Mason and is also known as David Jefts the 2nd.
David Jefts 2nd married Abigail Barrett 5 Apr 1804 in Mason.
The other David Jefts married Edee Barrett on 10 Apr 1803 in Mason.