I believe this is the line, but part of the information relies on Ancestry & FamilySearch databases, so please verify.

(Deacon) John DUNHAM [m1. Susanna KAINO, many spellings] & Abigail BAILLIOU, m. 22 Oct. 1622, Leyden, Holland.

Benajah DUNHAM (b. by 1640, Plymouth, MA - 24 Dec. 1680, will dated 10 May 1679) m. 25 Oct. 1660, Eliz. TILSON, d/o Edmund.

Edmund DUNHAM (25 July 1661, Plymouth, MA - [17?] Mar. 1734, Piscataway, Middlesex, NJ) m. 15 July 1681, Mary BONHAM (4 Oct. 1661, Barnstable, MA - 15 July 1742, Piscataway, NJ).

Jonathan DUNHAM (16 Aug. 1694, NJ - 10 Mar. 1777, bu. Dunham Bu. Ground, 12 Baldwin Road, Edison, Middlesex Co., NJ) m. 5 Aug. 1714, Jane PYATT/PIAT, by Rev. J. DRAKE. Jane d. 15 Sep. 1779, aged 84.

David DUNHAM (14 Mar. 1723 - 6 Oct. 1806/7?) m. 14 Oct. 1750, Piscataway, NJ, #3577, Rebecca DUNN (b. 30 Aug. 1732/3/4? - 30 Aug. 1784, Raritan Twp., Middlesex Co., NJ, Geneal. Mag/o NJ, Apr. 1926).

Jonathan DUNHAM (ca. 1751 - 29 Nov. 1832, bu. Edison, NJ) m1. Sarah LENOX (ca. 1752 - 6 Jan. 1797, aged 44 at death).

Jonathan DUNHAM (25 Dec. 177_ - 6 Mar. 1856, bu. Riverside Cem., Sharpsville, Mercer Co., PA) m. ca. 1801, Mary CLARK, d/o Henry.

Justice/Justus DUNHAM (2 Oct. 1804, Mercer Co., PA - 10 Aug. 1881, Decatur Co., IA, bu. Dale Cem., Hamilton Twp.) [m1. Elizabeth BUDD & had Eunice who m. Jas. Martin DALE] m2. Mary FERGUSON, 25 in 1850, 36 in 1860, d/o Mary & Robert, & had James T., Clark, Robert, & Almeda.

James Taylor DUNHAM (1 July 1845, Mercer Co., PA, per pension record - 7 Jan. 1920, obit. of 9 Jan., Paris, TX, Morning News, Lamar Co., TX, survived by 4 sons & a dau.; bu. Red Hill/Redhill Cem., Lamar Co., TX) m. 8 Feb. 1874, by Rev. E. OWENS, BONHAM, Fannin Co., TX, Frances Ann MARTIN (16 Oct. 1851, OH [28 in 1880] - 18 Oct. 1890, BONHAM, Fannin, TX), dau/o Asa W. MARTIN & Emily MILLER. Children

Mary Adeline "Mollie," b. 16 Nov. 1874, BONHAM, TX; m. 12 Apr. 1891, Will CURTIS. She must have preceded her father in death.
Asa West (8 Dec. 1876, IA - 4 Oct. 1930, Paris, Lamar, TX; bu. Red Hill) m. May _.
Roscoe Leroy/Laroy (2 Oct. 1879, IA - 15 Feb. 1955, Hugo, OK; bu. Red Hill) m. 12 Dec. 1906, Lamar Co., TX, Minnie Myrtle [RANDALL] ANDERSON (28 Dec. 1881, AR - 23 July 1968, Paris, TX) d/o Mary & James RANDALL, death cert. at pilot.familysearch.org
Ira Orval (10 Dec. 1880/2, IA - 28 Nov. 1941/2, Ft. Thompson, Pushmataha, OK; bu. Antlers, Pushmataha Co., OK) m. 10 Sep. 1905, Caviness, Lamar, TX, Catherine "Cattie" SMITH
Grace Ola (9 Mar. 1884 - (8 Je. or 6 Aug? = 8-6) 1961, per Daily Oklahoman, OK City, OK
James Taylor, b. 8 Aug. 1886, m. Ada _
Lola Etta (28 Apr. 1889 - 20 Sep. 1899).

Census, Hamilton, Decatur, IA, 1880, DUNHAM, Justus, 75, PA NJ PA; wf. Mary, 55, PA PA PA; dau. Almeda, 17, IA.
DUNHAM, James, 34, PA PA PA; wf. Francis, 28, OH PA VA; Ch., Mary A., 5, TX; sons Asa W., 3, & Roscoe L., 6 mo, b. IA.

Census, Lamar Co., TX, 1910, DUNHAM:
J. T. [James Taylor], 64; Grace, 26.
John H., 56; Lavina, 56; Anna, 20; Vnabell {sic), 13.
Roscoe, 30; Myrtle, 22; Minnie, 1.
Asa, 34, with S. W. STEPHENSON, 31, & Mara STEPHENSON, 19.

Census, Lamar Co., TX, 1920 (households not shown) DUNAM {sic}:
A. W., 43; May, 24
J. T. [James Taylor, b. Aug. 1886], 33; Ada, 27.
Doyles, 5; Granvel, 3; Caddie, 2 [must belong to Asa or James].

Census, 1930, Fannin Co., TX, DUNHAM, Asa W., 53; May, 32; Philip, 9.

Philip DUNHAM (11 Aug. 1920 - 30 Aug. 1998, last res. Ft. Worth, per SSDI) m. 2 July 1947, Ethel, b. 28 Nov. 1921.