The names you are searching were all prominate surnames in the Seventh Day Baptist Church founding and migration. In the membership records I find an Ethan Burdick 1825 in the 1st Brookfield (Leonardsville) church. About 1848 I find a Mary Rogers in the Truxton, Cortland Co church. In abt 1817/1831 a Polly Rogers in the Preston Chenango Co Church. Also in the Alfred Allegany Co church a Dorcass Allen daughter of Ethan Burdick Sr b 6/15/1795 d Milton WI 2/8/1875 mar Abram Allen son of John in 1822. The SDB Church published a paper, "The Sabbath Recorder" with news of marriages, deaths etc back then and still do publish it. It is available on microfilm at the Hinkle Library at Alfred Univ.