Another Duelar for your file. I found the following information at www.ellisislandrecords.com
Passenger= Duelar, Stanislaus
Date of arrival in New York= 1 Mar 1892
Age on arrival= 25y [therefore born ~1866/67]
Ship name= Oldenburg
Port of departure= Bremen, Germany
Maybe it will help. There was only this one person listed under this spelling. The site lists arrivals at Ellis Island, New York from ~1892 to ~1920.