Robertson is a Swedish patronymic surname meaning "son of Robert". It is the Swedish cognate of English surnames like Robertson and Roberts, formed by adding the Swedish suffix -sson ("son") to the given name Robert. Etymology The root name Robert derives from the Old Germanic Hrodebert, composed of the elements hruod ("fame") and beraht ("bright"), thus meaning "bright fame". The name was introduced to Scandinavia via Christianization and became common in Sweden, where the patronymic naming tradition persisted into the 19th century. The suffix -sson indicates direct patrilineal descent: Robertsson literally denotes "Robert's son" (or, in modern Swedish, any descendant bearing the surname in standard fixed form). Distribution and Variants The surname is concentrated in Sweden, with smaller numbers in neighboring Scandinavian countries. Danish and Norwegian cognates include Robertsen (with -sen). Variant English forms include Roberson (from the hypocoristic Rob), Roberts (directly from the given name), Robertson (with Scottish/English -son), and the unusual Dobbs (from a pet form of Robert — "Dob" — with redundant -s). The French form is simply Robert, which in France acts as both given name and surname. Current Frequency According to surname directories, Robertsson remains moderately common in Sweden, though it is less frequent than the English export Robertson on the global stage. Many historical Swedish emigrants to the United States anglicized their patronymics, but Robertsson continued in modified (and often standardized) form in modern Sweden. Meaning: "Son of Robert" (patronymic) Origin: Germanic root through Swedish patronymic tradition Type: Surname (Swedish -sson formation) Usage Regions: Primarily Sweden