Yes, this is the same family.There are Diemer at Zinswiller who are not of any connection that I can see, but most of the others belong to the two families from Niedermodern.
Hans Christman DIEMER, 1649-1723, married, 1680 (3rd marriage) to Christina WAHL (c1652-1729).They moved from Niedermodern to Gundershoffen, abt 1690.Parents of
Hans Christman DIEMER, b 1689 at Niedermodern, still living 1771 at Gundershoffen (burials here are missing, 1753-1777, but he signs his daughter's marriage in 1771).He married, 1719, to Catharina MAHLER (1701-??), from Engwiller.Catharina's grandparents, Hans MAHLER and Catharina WESTER, from Mietesheim, are ancestors of the Alsatian national hero, Dr SCHWEITZER.
Children of Hans Christman DIEMER and Catharina MAHLER:
1. Johann Jacob DIEMER, b 1720, living 1783 in PA, where he emigrated in 1766.Married Catharina Barbara FISCHER and had issue.
2. Christman DIEMER, b 1721; no further records found.
3. Johann Georg DIEMER, 1722-1727
4. Christina DIEMER, 1725-1727
5. Anna Margaretha DIEMER, 1727-1728
6. Maria Catharina DIEMER, 1728-1729
7. Anna Elisabetha DIEMER, 1729-1752; married Johann Georg MARX, blacksmith and had issue, one child who probably died in infancy (no further records found but burials are missing)
8. Christina DIEMER, 1731-1764; married (as 2nd wife) Johann Daniel MUELLER, widower from Langensoultzbach (the former husband of her cousin Maria Catharina DUCHMANN); married, 2nd, Johann Daniel SUESS, also a widower; and had issue.As far as I know, she had only one surviving child, a daughter who married at Engwiller in 1779 and may have left issue.
9. Anna Eva DIEMER, b 1733; married, 1st, Johann Heinrich MUELLER from Langensoultzbach; 2nd Johann Georg SCHNEIDER, widower at Engwiller; 3rd Johannes HILD, bachelor at Engwiller; 4th, Philipp Jacob MAHLER, from Morsbronn, her somewhat distant cousin, and had issue by first and last marriages.
10. Johann Philipp DIEMER, below.
11. Margaretha DIEMER, c1742-1810.Not married, no known issue. No birth is recorded for her at Gundershoffen, but she's identified in her death act.The blank entry in the 1742 baptisms may be hers, though it's not clear why it was never filled in, if so.
Johann Philipp DIEMER, son of DIEMER and MAHLER, 2 July 1737-5 November 1796; married, 2 January 1758, toAnna Margaretha WEBER, born 12 November 1737 at Mietesheim, died 27 November 1808 at Gundershoffen.Philipp's maternal grandfather, Hans Jacob MAHLER, was the brother of Margaretha's paternal grandmother, Salome MAHLER.The Mietesheim record of this marriage notes that they had a dispensation for consanguinity in the third degree. They had 15 children, most of whom died as infants.Some were apparently premature, as the dates indicate.
1. Anna Margaretha DIEMER, below.
2. Johann Philipp DIEMER, 14 January 1761-13 February 1816; married, 1787, to Maria Magdalena WENNER, no issue.
3. Catharina DIEMER, 13 December 1762-15 January 1837.Not married.Had one illegitimate son, who died as a child.
4. Christman DIEMER, 19 December 1764-25 January 1844.Married, 1812, to Barbara HOFFLER and had issue.
5. Salome DIEMER, 13 March 1767.No other records found, but probably died, as the name was used again.
6. Christina DIEMER, 19 March 1768.No other records found.
7. Georg DIEMER, 15 February 1770.No other records found.
8. Johann Peter DIEMER, 10 November 1772. No other records found.
9. Johann Jacob DIEMER, 28 November 1774.No other records found, but baptized immediately due to weakness, and probably died.
10. Johann Michael DIEMER, 28 November 1774 (twin).No other records found, but baptized immediately due to weakness and probably died as the name is used again.
11. Anna Maria DIEMER, 8 July 1776.No other records found, but baptized immediately by midwife due to weakness; probably died.
12. MariaSalome DIEMER, 17 April 1777.No other records found, but probably died soon after.
13. Maria Magdalena DIEMER, b/d 14 January 1778; baptized by midwife.
14. MichaelDIEMER, 22 September 1778-23September 1778. Barely 8 months after the previous birth, and probably premature.
15. Johann Diebolt DIEMER, 4 July 1779-20 February 1844.Married, 1802, to Dorothea Elisabetha MALLO, and had issue.
Anna Margaretha DIEMER was born 31 January 1759, daughter of DIEMER and WEBER.On 27 March 1784 she had an illegitimate child, Margaretha, whose father was identified as Johann Peter JUNG, son of Christman JUNG, farmer at Engwiller.The record is in the Catholic churchbook at Gundershoffen, as is usual with illegitimate children of Lutherans in the 18th century.
Margaretha DIEMER married, 25 May 1788, to Johann Peter DUERRENBERGER, citizen and widower (his occupation is usually given as "miner" in the records).They had a child Eva Magdalena, born 1789.The 1790 records here are missing, but Peter emigrated, with most of his father's family, to America in 1791.(One brother, Stephan DUERRENBERGER, 1769-1827, remained in Europe.)
Two children of the extended DUERRRENBERGER-DIEMER family were both left behind in Europe.
Peter's daughter by his first wife, Maria Elisabetha DUERRENBERGER, born 1786, did not emigrate.I don't know where she was in the meantime, but she married at Uttenhoffen in 1825 to Johann Georg LAZARUS, widower from Mitschdorf.The record says that her father has been "absent in America since the year 1791."
Margaretha's illegitimate daughter, Margaretha JUNG, also stayed behind, probably in the household of the uncle, Philipp DIEMER at Gundershoffen.Margaretha JUNG married there in 1812 to Johann Georg MUNCH, from Jaegerthal.The record names her father as unknown and her mother as Margaretha DIEMER, deceased, though I suspect they did not know if the mother was actually living.It also states that Margaretha is "assisté" by her uncle, Philippe DIEMER, citizen here at Gundershoffen.I haven't found children or deaths for Margaretha or MUNCH here, so they probably lived at Jaegerthal.
My ancestor was Anna Margaretha DIEMER (1692-1744), the younger sister of HansChristman (b 1689).She married Adam DUCHMANN from Niedermodern.Their son Christman DUCHMANN lived at Gundershoffen in the 1740s and emigrated to America in 1749.Both Christman and his brother Adam DUCHMANN seem to have been very close with Johann Jacob DIEMER, oldest son of Christman and Catharina.