Roberts Connection to Mccluskey Family Tree

My ancestor, Benjamin Franklin Roberts (born 1810 in Grundy County, Tennessee)(wife Anna Meeks) is listed as son of Nathan Roberts and wife Abigail Bishop in the Roberts-McCluskey Family Tree (Public Member Trees). I know nothing about Nathan but was told his father was Archie Roberts, born abt 1749 and emigrated from the UK with 3 sons, Isaac, Daniel and Nathan. Any information will be greatly appreciated.