With his wife, Elizabeth, Mark Wismer had the following children: Henry, Susan, David, Mark, Catherine, Daniel, Barbara, Elizabeth, Anna.
Mark Wismer is listed as a Patriot Ancestor in the Sons of the American Revolution. In 1780, he was a private in Captain William McHenry's Associators.
He died in Bucks County, Pennsylvania, and was buried at Perkasie in the Deep Run Mennonite Church Cemetery on 16 May 1831. According to FindAGrave, he was buried in an unmarked grave and was aged 94 years and 22 days (thus his birth date was 22 April 1737). 
↑ 1.01.11.2 Brief History of Jacob Wismer and a Complete Genealogical Family Register of his descendants from the earliest available records to the present time with portraits and other illustrations by Rev. Abraham James Fretz (introduction by Eli Wismer of Plumstead, PA) Mennonite Publishing Co 1893 (Page 280)
↑ Ancestry.com. U.S., Sons of the American Revolution Membership Applications, 1889-1970 [database on-line]. (Provo, UT, USA: Ancestry.com Operations, Inc., 2011). Original data: Sons of the American Revolution Membership Applications, 1889-1970 (Louisville, Kentucky: National Society of the Sons of the American Revolution); Microfilm, 508 rolls. Volume 336.
↑ Historical Society of Pennsylvania; Philadelphia, Pennsylvania; Historic Pennsylvania Church and Town Records; Reel: 654. Source Information: Ancestry.com. Pennsylvania and New Jersey, Church and Town Records, 1669-2013 [database on-line] (Lehi, UT, USA: Ancestry.com Operations, Inc., 2011). Original data: Historic Pennsylvania Church and Town Records. Philadelphia, Pennsylvania: Historical Society of Pennsylvania.
It may be possible to confirm family relationships with Mark 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 Mark: