Looking for Shipmans Ancestry

Am a granddaughter of [Alonzo McClaural Shipman]. I'm trying to trace the lineage as far as I can. So far I have Alonzo Shipman to [John Hollis Shipman and Nellie Ann Wilfong] to [John Bogue Shipman and Mary Ann Pierce] to [Nathaniel Shipman and Prudence Bogue] to [Abner Shipman and Margery Avery]. Any help would be appreciated.