There is a Coffey/Boone marriage in NC.This family is related to Daniel Boone.Anna Boone, gt niece of Daniel Boone m William Coffey on Oct 16, 1804 In Wilkes Co NC. Wilburns also lived in Wilkes Co NC. I'm uncertain how these Wilburns are related to Boone families but there does appear to be some kinships between these families.At least one Boone relative was named Wilbourn Boone.
One of their sons was named Wilburn (1807-1897) and another named Gilliam Coffey.
For a number of reasons, I think that your Coffee line is related to this family.
You might want to explore some possible connections to your Coffee and the Boone families.