Curtiss, Frederic Haines, 1903. A Genealogy of the Curtiss Family, being a Record of the Descendants of Widow Elizabeth Curtiss, who settled in Stratford, Conn., 1639-40. Rockwell & Churchill Press, Boston, pages 21, 45
It may be possible to confirm family relationships with Jonathan by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Jonathan: