I am also looking for Berks and Montgomery County Yergers to fill in some blanks.My Sarah (nee Dellecker) and Jacob Yerger may account for the "D" for the middle initial of your David D. Yerger.Pike Twp., Berks Co. is very close to the Montgomery County, line.
What I know and haven't been able to piece all together yet is:
Sarah B. Dallecker (b.7-9-1800 d. 11-12-1845)buried at Union Church Cemetery; Boyertown.Sarah m. Jacob Jorger [Yerger]....could be the Jacob in the obit below.
Montgomery Ledger of Pottstown , March 10, 1885
Jacob Yerger, an aged and well known citizen of Colebrookdale township, Berks Couny, died on Saturday last, near Gabelsville, aged 89 years, 9 months and 27 days.Deceased lived for many years on his large farm (which he still owned) near Pikeville, Pike Township adjoinging the farm of the late Dr. William Herbst.
St. Joseph's Hill Church Cemetery, Pike Twp., Berks County, PA:Section 2, Row 38 - Jacob Yerger (b. 5-3-1795 d. 2-28-1885) age 89-9-25
Union Church Cemetery, at German Reformed Church (now Good Shepherd UCC) Boyertown
Sara JORGER nee DALEKER(b.7-9-1800 d. 11-12-1845) 45 yr 4 mo 5 days m. Jacob JORGER
OTHER YERGERS same cemetery as above:
Sarah JERGER (b.12-27-1823 d. 7-16-1848) 24 yrs 6 mo 19 days wife of Michael JERGER
Solomon JORGER (b.5-28-1817 d. 7-25-1857) m. Lydia GROFF and had 2 children, 1 son and 1 daughter, m. for 18 yrs
Baptisms New Hanover Lutheran Church, MontgomeryCounty, PA
Angelina Yerger, (b. Dec. 1, 1831 bpt. Arpil 8, 1932) d/o Jacob & Sarah Yerger, Sp: Cath. Yerger
Benjamin Yorger (b. Oct 7, 1826 bpt. Jan. 7, 1827) s/o Jacob & Salome Yorger, Sp: George Schmidt & Catharine
Yorger, Sarahann (b. Feb. 14, 1828 bpt. May 25, 1828) d/o Jacob & Salome Yorger, Sp: Daniel Emmerich and Susanna Dellicker.
OTHER YERGERS at Hill Church Cemetery, Pike Twp., Berks Co., PA:
Section I Row 33 - Angeline (nee Yerger) Wise (b. Dec. 1, 1831 d. Mar. 17, 1909) w/o Joel Wise
Section I Row 29 - Joel Wise (b. Dec. 21, 1826 d. May 22, 1904) age 77-5-1
Section IV Row 1 - Sarah D. Schultz (nee Yerger) (b. Feb. 13, 1828 d.Sept. 23, 1910)
Daniel Schultz (b. Oct. 21, 1821 d. Aug. 28, 1895) age 73-10-7
Malinda Y. Schultz (b. Nov. 10, 1851 d. May 11, 1937)
Section 2 Row 38 - Sophia D. (nee Yerger) Moser (b. Feb. 7, 1822 d. Aug 9, 1884) age 62-6-2 w/o Jacob Moser
Section 2 Row 29 - Jacob M. Moser (b. Feb. 21, 1820 d. Mar 26, 1906) 86-1-5 Co. H. 175th PA Regt.
Section 2 Row 48 - Henry D. Yerger (b. Mar 11, 1836 d. Nov 30, 1912) age 76-8-19 ?Father?
Sarah D. (nee Reider) Yergery (b.Nov. 29, 1838 d. Apr 23, 1912) age 73-4-24 ?Mother?
Boyertown Democrat, Oct, 7, 1905 - marriage
Warren R. Yerger of Barto and Miss Ellen L. Rhohrbach, of Gabelsville, were married on Saturday at Pottstown by. Rev. J. J. Kline.
Baptisms, St. Joseph?s Hill Lutheran Church, Pike Twp., Berks County:
David Jerger (b. Nov. 21, 1847 bp. Mar. 12, 1848) s/o George Jerger and wife, SP: D. Wm. Herbst & Catharine
Jefferson (b. June 30, 1854 bpt. Oct 1, 1854) s/o Joel Weis & Angeline, SP: JacobSpringer & Molly
Amanda (b. Nov. 8 1858 bpt. Dec. 19, 1856) d/o Daniel & Sarah Shulz, Sp: Harrison Haug and Amanda Jerger.
Amanda Louisa Yerger (b. Mar 25, 1864 bpt. May 8, 1864) d/o Benjamin Yerger & Maria, Sp: Daniel and Sarah Schultz
Calvin Yerger (b. June 15, 1864 bpt. Aug. 28, 1864) s/o Henry Yerger & Sally Ann, Sp: Parents
Clara Louisa (b. Aug. 11, 1867 bpt. Nov. 17, 1867) d/o Aaron Yerger & Rebecca, Sp: Parents
John (b. Apr. 3, 1867 bpt. June 30, 1867) s/o Daniel Schultz & Sarah, Sp: parents
Annie (b. Dec. 18, 1887 bpt. Feb. 12, 1888) d/o Alfred B. Yerger & Ida F. Yerger, Sp: Parents
Jennie S. (b. July 16, 1889 bpt. Aug. 8, 1889) d/o Calvin Yerger & Caroline, Sp: none listed
Carrie Sevilla (b. Sept 27, 1891 bpt. Dec. 13, 1891) d/o Calvin R. Yerger & Caroline, Sp: none listed
Raymond Ernest (b. Sept. 6, 1891 bpt. Dec. 13, 1891) s/o James Stauffer & Ellen Yerger, Sp: none listed
Bertha May (b. Mar. 17, 1892 bpt. May 3, 1892) d/o Samuel B. Yerger & Katie, Sp: none listed
Henry Ralph (b. Nov. 27, 1892 bpt. Dec. 17, 1892) s/o Henry Yerger & Ida, Sp: none listed
Hettie Matilda (b. July 18, 1894 bpt. Aug. 14, 1894) d/o Samuel B. Yerger & Katie, Sp: none listed
Elsie (b. Feb. 26, 1897 bpt. Apr. 11, 1897) d/o Samuel Yerger & Kate, Sp: none listed
YERGER Deaths, St. Joseph?s Hill Lutheran Church, Pike Twp., Berks County, PA
Hettie Matilda Yerger (Aug. 31, 1894) age 0-1-13
Elsie May Yerger ( Apr. 12, 1895) age 1-2-3
Daniel Schultz (Aug. 28, 1895) age 78-10-3 [sic]
Aaron Yerger (Dec. 18, 1895) age 25-1-18
William Robert Yerger (Feb. 12, 1896) age 7-4-26
YERGER Marriages St. Joseph?s Hill Lutheran Church, Pike Twp., Berks County, PA
Sept. 28, 1891 ? George R. Reichard of Pikeville and Annie R. Yerger
Sept 23, 1893 ? Morris R. Yerger of Pikeville to Annie R. Herbst of Hill Church
Apr. 7, 1894 ? William R. Yerger of Friedensburg to Susanna M. Clauser of Shanesville
Hope some of this rings some bells for you and is helpful.