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The Gelsenii were a Swedish family of parish priests. Their ancestor Thorerus Caroli came from Horn. The name Gelsenius was inspired from the parish name Gärdserum. In past the parish name was spelled Gärserum, Gälserum Gelserum, Gälvesrum and Gellersrum. Later generations modified their surname to Gerdeman.
Resources
- Adelsvapen,Gerdeman
- Family Tree DNA, Gelsenius yDNA Project