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Patronyme, not an actual surname although it can be used as such. Similar names: any given male name + dotter = father's name + daughter i.e. Henric's daughter any given male name + son = father's name + son i.e. Henric's son
Sometimes the patronyme became a fixed surname and that is the case with most 20th century names. During the previous centuries it is safer to assume it being used to denote paternal connection rather than being a surname. In addition to patronymes and matronymes (mother's name) names of the house, or estate, has been used instead of surnames. In such cases the 'surname' appear to change as the person changes residence and the next inhabitant takes up the placename. Similar practise has been known in the military service, i.e. the person taking up service after a casuality or retirement can get the same name as the previous one without being genetically related at all. Care should be taken in checking the actual genetic relationships between generations in such cases as mentioned above.