Evert DeWitt married Gertrude Persen, daughter of Abraham Person and Catrina Schoonmaker. Evert DeWitt was baptized in 1733. He was the son of Lucas DeWitt Jr. and Catherine Roosa.
Evert DeWitt was Type: Source Catskill p. 24; Zion Luth Ch. Rec, Loonenburgh (Athens) NY.
Catherine Roosa was baptized on 16 February 1709. She was the daughter of Evert Roosa and Tietje Van Etten. Catherine Roosa was born on 16 September 1709. She married Lucas DeWitt Jr., son of Lucas DeWitt and Annatje Delva, on 17 January 1729.
Her married name was DeWitt.
Hope this helps---internet sourse use as a guide as I have not tested the material.