Since I do this professionally on the side, I will gladly do this next bit gratis but will need to limit it to that lest my paying clients get too upset with me. ;o)
1. Susanna is the daughter of Georg Heinrich Kern, a citizen of N. L. By the way, you may wish to double check the record; however, it looks to me as if they were married 1 May 1758. In fact, it is always best to double check each of the entries below against the original baptismal, marriage and burial books to ensure dates are correct and other additional info was not excluded in the summary.
2. notes about Christian's children:
#1 Johannes * 17 Jun 1733, married
#2 Joh Peter * 8 Feb (year not listed), married
#3 should read Maria Eva Elisabeth who was married to Peter Stief in '72
#4 Joh. Veltin *11 Jan 1743
#5 Christiana * 2 Sep 1745, married to Georg Lucas Beister in 1772 they had illegitimately Phil Jakob * 14 Oct 1768 and died the 26th of the same month.
#6 Joh. Heinrich * 14 Mar 1748, and died the 21st.
#7 Joh. Heinrich * 16 Sep 1749 and died 14 Mar 1752
#8 Katharina Christina * 13 Oct 1752; she had illegitimately Juliana * 22 Sep '78; who died 1 Oct '78,
married to Joh. Jak. Baumeister
#9 Joh Tobias * 8 Sep 1755 and (died ?) 4 Mar 1757
Hope this helps,