Marion was the son of Alfred Vanderpool and Sarah Lucy Bennett. He married Cynthia Louisa Miles, 12 Jun 1861, in Whitley County, KY and they had 26 children - one of the largest families in Kentucky.

Home in 1880: Whitley, Kentucky (1 Jun)
Marion Vanderpool, 35, KY-YN-KY, Farmer
Louisa Vanderpool, 34, KY-TN-TN
Sterling Vanderpool, 17. KY
Peter Vanderpool, 16, KY
Daniel Vanderpool, 13, KY
James M. Vanderpool, 12, KY
Nancy Vanderpool, 11, KY
Mary Vanderpool, 10, KY
Julia Vanderpool, 9, KY
Marion Vanderpool, 7, KY
Joseph Vanderpool, 3, KY
Sarah Vanderpool, 2, KY
Sampson Vanderpool, 1, KY

Home in 1900: Level Green, Whitley, Kentucky (1 Jun)
Marion K. Vanderpool, 56, Jun 1843, KY
Louisa, Wife, 55, Jan 1845, TN
Sampson, Son, 20, Jun 1879, KY
Benjamin, Son, 19, Jun 1880, KY
Susan, Dau, 14, Dec 1885, KY
Louisa, Dau, 12, Mar 1888, KY
Francis C., Dau, 10, Dec 1889, KY
Marion K. Britton, Grandson, 12, May 1888, KY
Louisa Britton, Granddau, 10, May 1890, KY

Home in 1910: Level Green, Whitley, Kentucky (15 Apr)
Marion K Vanderpool, 65, KY-TN-KY, Married 48 years, Farmer
Louisa Vanderpool, 64, TN-TN-TN, Children 26/11
Susan Vanderpool, 23, KY
Frances Vanderpool, 20, KY Rural Mail Carrier

Idaho Death Index:
Name: Vanderpool, Marion Kendrid
Certificate Number: 001964
County of Death: Clearwater
City: Orofino
Date of Death: 23 Apr 1912

The Vanderpool Family Probably The Largest in Kentucky: The gray-haired father, though already past the allotted three score years, wielded the ax throughout the day, setting the pace for his stalwart sons, and before him tree and sapling fell, thickets of bramble and briar were swept from the face of the mountain, and when, at night, came the old fashioned mountain dance, none were more eager to "swing corners" or "balance all" than was the old man. His partner was his good wife, who, though twenty-six little ones had been nurtured at her breast, though the weight of maternal care and the weight of fifty-nine years are upon her shoulders, keenly enjoyed the pastime, and until the "wee sma" hours participated in the dance to the twanging of the banjo. Marion Kennard Vanderpool, though now past sixty-two years of age, is as hale and hearty as a man of middle age, and is still dissatisfied with a day's toil unless he has accomplished as great a task as the most industrious of his sons. His habits are as regular as the movement of a clock. He retires as the day is still fading in the west and is up and doing before the first break of dawn. He is of massive figure, as straight as a shingle, and stands six feet, one inch, in his stockings. His frame is muscular and devoid of superfluous flesh. He is proud of his faultless health, powerful frame and herculean strength. Despite his advanced age he is agile and alert. He suffers from no physical defects. His eyes are as keen as those of a lad, his hearing is unimpared and acute. He can detect the rustle in the leaves made by a squirrel as it slips through the mountain thickets, and can speed a bullet from his old fashioned rifle straight to the head of the little animal and bring it down from among the foliage. His good wife, the mother of his phenomenal family, is small of stature, weighing only ninety-eight pounds. She, too, boasts of wonderful health and strength. She personally superintends her household and is not satisfied unless busy at some self-imposed task. She begins her routine with the daybreak and rests from her toil only after the day is done and her household sleeps. Mr. Vanderpool was born and reared in Whitley county, within ten miles of where his present home now nestles in a mountain valley. When sixteen years of age he married Cynthia Louisa Miles. A year later a child was born to them, and each year thereafter for twenty-six years, until the family became one of the largest known in the history of modern times. Mr. and Mrs. Vanderpool are now the proud grandparents of forty-four grandchildren, most of them reside in Whitley county, and are often at their home. On the occasion of the "working" a large group of them, ranging in age from six months to twenty years, were at the old home and partook of the festivities of the occasion. The family record is interesting. All the children were born in Whitley county, the native of their father. The names and dates of birth are as follows, in the order they were born, with the exception of five infants, never named, who fill in the vacant years in the list. STARLING, born August 5, 1862; PETER, born November 1, 1863; JOHN, born November 3, 1864; DANIEL, born December 24, 1866; JAMES, born February 22, 1868; NANCY, born February 11, 1869; MARY, born December 27, 1869; JULIA, born November 20, 1870; GEORGE, born May 12, 1871; HARIAM, born March 18, 1872; LENVIL, born April 27, 1873; LUCINDA, born January 9, 1874; JOSEPH, born December 9, 1876; SARAH, born April 14, 1878; SAMPSON, born June 3, 1879; BENJAMIN, born June 28, 1880; CHESLEY, born October 23, 1881; JERRY, born November 20, 1882; SUSIE, born December 26, 1885; LILA, born March 20, 1887; FRANCIS, born December 18, 1889. The married sons and daughters who have families are: Starling Vanderpool, seven children; Peter Vanderpool, two children; Daniel Vanderpool, nine children; James M. Vanderpool, six children; Nancy Siler, six children; George Vanderpool, three children; Joseph Vanderpool, three children; Benjamin Vanderpool, two children. (The data from which this story is compiled was gathered by the Kentucky Children's Home Society, pursuant to that organization's system of tracing the genealogical history of large families.)