I have Trin Luth Baptisms 1751-1790, and Margretha Barbara was the first Clemenz child to be baptized there.Her sponsors were Casper MADERA and Marg. Barbara at her baptism on 8/29/1779. The next entry for any CLEMENZ/S was in 1783 when Abraham and Christina were sponsors for Christina Elisabetha KOCH, dau of Michael and Eva Dorothea KOCH, born 9/23/1783 and bp 11/9/1783. Then the next entry involving Abraham and Christina is their child Maria Esther CLEMENZ bapt 4/4/1784 with spons: Adam KOCH, single and Maria LOESCHER, single (They later married 5/16/1784 - Adam was son of Michael KOCH, and Maria dau of J. Nicolas Loescher).
Since there are no earlier entries for Abraham at this church, he could have very well located to Reading at or near 1779 when Marg. Barbara was baptized there.There is no marriage for him in the records there.
From Trin Luth. Marriages 1754-1812,there is a marriage for Catharina CLEMENZ, dau of Abraham, to Christian FUCHS, youngest son of David FUCHS, dec'd, both of Reading, on 12/8/1793.So we find another daughter, Catharina!
Also Barbara CLEMENS, Reading,to Leonhard HAAS of Exeter, on 9/11/1808.