Greetings; My father told me more than once that Remsen was shortened from Remjansonvandorbeek way back when. Quite a mouthful! Didn't realize there were so many Remsens out there. The name seems to be quite familiar in the Brooklyn Heights area of N.Y.C. My father spent a part of his youth growing up in that area. William Remsen Maylone Longmont, Co.