Children birthdates found in Joachim's Pension Records.
Revolutionary War Service
"Joachim was rank of private in Capt. Stillwell`s Co defending Elizabethtown, NJ in 1776...when the British arrived at Brunswick, the American troops left Elizabethtown for the Raritan River at a place called Tunison`s Tavern.
His duty was intermittent until 1781. In 1780 he removed from Huntington Co (DAR record indicates he was of Hunterdon Co) to Somerset Co and during this time he was periodically called to serve.
Certificate of pension issued 3 Dec 1833, credited with 18 months as a private in Capt. Stillwells. " 
↑ United States. Census Office. 6th census, 1840. A Census of Pensioners for Revolutionary Or Military Services: With Their Names, Ages, Places of Residence, As Returned by the Marshals of the Several Judicial Districts, Under the Act for Taking the Sixth Census. Washington: Printed by Blair and Rives, 1841; HathiTrust https://babel.hathitrust.org/cgi/pt?id=mdp.39015076550824;view=1up;seq=139;size=175, Virgina, Western District, Brooke County, Joachim Wicoff age 90. p. 133.
It may be possible to confirm family relationships with Joachim 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 Joachim: