He was originally from Werder in Pomerania or East Prussia and purchased a house in the city in 1589.
The name Seidelin was passed on through his daughters who in accordance with German tradition added the suffix -in to their father's name.
[1] Post Master-General Hans Seidelin (1665-1740), a great grandson of Michel Seidel, was ennobled in 1731.
His daughter, Sophie Seidelin (1693-1741) married royal confessionarius Iver Brinck (1719-1728).
[3] Claus Seidelin Jessen owned Asserstrup from 1797 to 1803[4] and then Katrineholm at Vordingborg from 1804 to 182 and constructed its current main building.