For the longest time I had understood my line to be "Damser". Now I believe the name to be a minor variation of "Dumser". Your info. leads me to believe we may have a connection. You have a Sebastian Dumser marrying in 1885/88 in Manhattan. I may have a possible sister of Sebastian's, named Katherine(Catherine)Damser marrying a John Gaulrapp in 1881 in Manhattan. Katherine's parents (as listed on her marriage cert.) were Sebastian Damser and Marie Doll.