The 1850 Census for West Earl, Lancaster Co., PA has the following listing for George Yundt b. 1763
George Youndt age 84 (b. 1766 PA) Jesse Youndt age 58(b. 1792 PA) Sarah Youndt age 54(b. 1796 PA) Elizabeth Youndt age 47(b. 1803 PA) Franklin Kemper age 14(b. 1836 PA)
George Yundt's wife Elizabeth Weidman died in 1843 so George is now a widower. I believe Jesse, Sarah and Elizabeth are George's children as a review of Census listings from 1800 to 1840 supports this interpretation even though family members are only listed by sex and age groupings in these early Censuses. We know from the Henckel Genealogy that Elizabeth Yundt b. 1801 m. James Irwin who died in 1827 so the Elizabeth Youndt age 47 is his widow who is now listed by her maiden name. Franklin Kemper b. 1836 I believe is the son of Catherine Yundt b. 1801 and George Kemper b. 1801 so would be George Yundt's grandson.
By incorporating your info on Veronica (Fanny) Yundt b. 1797 m. John Kemper b. 1799 and Catherine Yundt b. 1801 m. George Kemper b. 1801 and the 1850 Census data on George Yundt b. 1763 I have updated my data on the George Yundt family as follows:
George Yundt b. 1763 PA d. 1854 PA Elizabeth Weidman b. 1772 PA d. 1843 PA Jesse Yundt b. 1791 PA Sarah Yundt b. 1795 PA Veronica (Fanny) Yundt b. 1797 PA m. John Kemper b. 1799 Elizabeth Yundt b. 1801 PA d. 1853 PA m. John Irwin b. 1795 Catherine Yundt b. 1801 PA d. 1878 m. George Kemper b. 1801 Anna Maria Yundt b. 1806 PA m. James Ohara b. 1801 Leah Yundt b. 1806 PA m. Samuel Bucher b. 1808 Susannah Yundt
I have been able to find all of George Yundt's children and their families in the 1850 and 1860 Census listings except for Susannah. The Henckel Genealogy notes that Susannah Yundt sponsored the baptism of her niece Anna Maria Ohara in 1839 so we know she lived at least to that date. Also note that Catherine Yundt's birth date appears to be 1801 not 1808 as indicated by Census listings and other Internet postings.
You mention that Hans George Jundt/Yundt's daughter Anna Maria Yundt married Jacob Carpenter which is correct. I have much more data on the Hans Georg Jundt - Maria Margaretha Henkel family if you are interested.