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English (of Norman origin): variant of Dawtrey a habitational name with fused French preposition d(e) for someone from Hauterive in Orne France named from Old French haute rive ‘high bank’ (rendered into Latin Alta Ripa). The medieval Dawtrey family had lands in Yorkshire Lincolnshire and Sussex in the 12th century.
Source: Dictionary of American Family Names 2nd edition, 2022
Surname Variants include: Dockeray, Dockerty, Dockharty, Dogherty, Dougherty, Doherty, Doherety, Docherty, Docharty, Daugherty, Dautry, Dautre, MacDevitt, O'Dochartaighy, O'Doherty, Dority, Dorothy, O'Dougherty, Doghartie, Dogerty, Doggart, Dockert, etc.