I found a reference to Isaac Gibson's family.   Isaac Gibson married Annie Wingerd (descendant of John Peter - Abraham Bohrer).
It looks like the Wingerd family was in Georgetown but I have not found her father, John Peter Wingerd.

I have a little info on John Peter Wingerd's family:
John Peter Wingerd was born 25 Dec 1796, died 17 Sep 1852
Ann Ferguson was born 9 Dec 1800, died 3 Oct 1852
Married 24 Oct 1818
1850 census: Maryland, Prince George's Co, Bladenburg Dist; John P age 52 clerk b DC, Ann age 50 b MD, Abraham 26 farmer, Mary C age 22, Ann S age 20, ELizabeth V age 15, Margaret J age 12, Virginia J age 9, George R age 6.
1850 census Washington DC 3rd Ward, John Wingerd age 23 clerk, bookbinders, p 160
Children:
John Wingerd b ~1827 clerk in bookbinders
Anna Sophia b 30 Nov 1831 see above
Abraham ~1824 farmer
Mary C ~1828
Elizabeth V ~1835
Margaret J ~1838
Virginia ~1841
George R. ~1844 (1870 census DC Georgetown p 552 George R age 31 clerk in store and Maggie age 33?)

II. Virginia Pendleton Orrick((8)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
III. Helen Cromwell Orrick((8)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VI. Robert S. Pendleton((6)) (William((5)), William((4)), Nathaniel((3)), Henry((2)), Philip((1))), b. 1824; d. 1880. Married Mary A. Pfeiffer. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Mary M. Pendleton((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
II. William H. Pendleton((7)). Married Ellen Wright.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
III. J. Philip B. Pendleton((7)). Married Edith Hower.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
IV. Robert Edmund Pendleton((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VI. William Henry Pendleton((6)) (William((5)), William((4)), Nathaniel((3)), Henry((2)), Philip((1))), b. 1817; d. 1873. Married Henrietta, daughter of Dr. Philip Grymes Randolph; was ordained at the Theological Seminary, 1843. Had parishes in Fauquier, Roanoke, and Bedford counties; was an eloquent preacher and an indefatigable worker. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Lucy Welford Randolph Pendleton((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
II. Susie Randolph Pendleton((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
III. Mary Randolph Pendleton((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
IV. Philip Randolph Pendleton((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
V. Henrietta Grymes Pendleton((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VI. Ellen Shepherd Pendleton((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VII. Garnett Peyton Pendleton((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VIII. Rev. William H. K. Pendleton((7)), of Marietta, Ohio.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VI. Elizabeth Shackleford((6)) (Lucy Tutt((5)), Elizabeth((4)), Nathaniel((3)), Henry((2)), Philip((1))). Married (1818) Minor Gibson, of Rappahannock Co., Va. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Lucy E. Gibson((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
II. Mary Ellen Gibson((7)). Married James Porter, M. D., Frostburg, Md.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
III. Martha Irene Gibson((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
IV. Isaac Gibson((7)), Episcopal clergyman. Married Annie Wingerd in 1853, of Georgetown, D. C.; address 17 E. Elm St., Norristown, Pa.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
V. Alcinda Esther Gibson((7)). Married G. E. Porter, M. D., of Maryland.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VI. John St. Pierre Gibson((7)), M. D. Married Mary Wallace, Augusta, Ga.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VII. Moses Gibson((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VIII. James Green Gibson((7)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VI. Mary Shackleford((6)) (Lucy Tutt((5)), Elizabeth((4)), Nathaniel((3)), Henry((2)), Philip((1))) married Col. Jonathan Catlett Gibson. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Mary Catlett Gibson((7)). Married Milton Fitzhugh. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Milton Catlett Fitzhugh((8)), of California.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
II. Lucy Ellen Gibson((7)). Married John Strother Buckner.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
III. Ann Eustace Gibson((7)). Married James B. Welch, of Alabama. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Leila Welch((8)). Married A. H. Davis.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
II. Eustace Welch((8)). Married Sally Berry.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
III. Susan Welch((8)). Married James Leisure.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
IV. Thomas Welch((8)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
IV. William St. Pierre Gibson((7)), Lieut. Cav. C. S. A., killed at Westminster.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
V. Jonathan Catlett Gibson((7)), enlisted as a private in the Culpeper minute men. Was rapidly promoted and became Colonel of the 49th Virginia Infantry, succeeding Col. Wm. (Extra Billy) Smith; represented Culpeper Co. in the Virginia House of Delegates for a number of terms. Married Mary G. Shackleford, and had issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Edwin H. Gibson((8)). Married Janie Grigg. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Jonathan Catlett Gibson((9)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
II. Edwin Agnew Gibson((9)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
II. Felix Gibson((8)), d. single.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.

VI. Mildred Williams Gibson((7)), d. young, single.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VII. John Shackleford Gibson((7)), d. unmarried.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VIII. Susan Gibson((7)), d. young.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
IX. Eustace Gibson((7)). Married Mattie Lacklin. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Pierre Gibson((8)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
II. Howard Gibson((8)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
III. Lee Gibson((8)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
Eustace Gibson represented the Huntington, W. Va., District in the House of Delegates, being Speaker, and also in the U. S. House of Representatives for two terms.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
X. Edwin Gibson((7)), d. single.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VI. Henry Shackleford((6)) (Lucy Tutt((5)), Elizabeth((4)), Nathaniel((3)), Henry((2)), Philip((1))), married Elizabeth Ross. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Mary George Shackleford((7)). Married Col. Jonathan Catlett Gibson.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
II. Lucy Shackleford((7)). Married, first, Judge Sinclair; second, Emile LeGrande.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
III. Kate Shackleford((7)). Married Corbin Jameson.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
IV. Bessie Lee Shackleford((7)). Married Capt. C. H. Lester, U. S. A.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
V. Shirley Shackleford((7)). Married Rev. W. R. Davis. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Henry Shackleford Davis((8)).
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
VI. Martha Shackleford((6)) (Lucy Tutt((5)), Elizabeth((4)), Nathaniel((3)), Henry((2)), Philip((1))) married Richard Spotswood, a great-great-grand-son of Governor Spotswood, being the son of John Spotswood and Mary Goode, the grandson of John Spotswood and Sally Rowsie, the great-grandson of John Spotswood, son of Gov. Alexander Spotswood and Miss Dandridge. Issue:
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
I. Lucy Spotswood((7)), d. 1868.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
II. Sally Bland Spotswood((7)). Married William Randolph Smith and resided in Richmond.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.
III. Col. Muscoe L. Spotswood((7)), a lawyer of Richmond, Va.
Volume IV
Chapter X The Pendleton Family.
Sixth Generation.