When Mads Jensen was born about 1752, in Åstrup, Nykøbing, Denmark, his father, Jens Madsen Dalstrom, was 22 and his mother, Mrs. Jens Madsen Dalstrom, was 20.
Some characteristic forenames: Scandinavian Erik, Nels, Niels, Lars, Holger, Einer, Jorgen, Bent, Knud, Per, Ove, Morten.
Danish, Norwegian, and North German: patronymic from the personal name Jens, a shortened form of Johannes (see John ). This is the most frequent surname in Denmark. In North America, this surname is also an altered form of the variant Jenssen . Compare Jenson 2 and Johnson .
English: variant of Jennison .
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