In a Quote from the Duggar Family Papers Collection at Auburn University - Goode Family notes:
"Some time after Dr. Reuben Henry Duggar (b. 1837) was grown he got mad at one of the family and he changed the spelling of the name Dugger to Duggar."
Dr. Reuben Henry Duggar is buried at St. Michael's Episcopal Churchyard Cemetery in Faunsdale, AL. The spelling on his Grave marker is "Duggar" .
Dr. Reuben Henry Duggar'sparents Henry Dugger b. 1798 and Alice Goode Vaughan Dugger and Brothers Frederick Elijah Dugger, John Watkins Dugger, Luke White Dugger, Hobart Cobb Dugger and William Waverly Dugger are all buried a few miles to the west at St Andres Episcopal Church Cemetery in Prairieville, AL. The spelling on all their grave markers is "Dugger"