MK
Mary Kirby — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Rockbridge-County, Virginia
Our Model Tree links this Mary Kirby across the 1920, 1930 and 1940 US Censuses in Rockbridge-County, Virginia (XGBoost, ~Confirmed) — first a spouse (b.~1891), then head of a 3-person household.
Age 49
b. ~1891
Female
Spouse
Born: Virginia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Rockbridge-County, Virginia |
| Surname | Kirby |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | Natural Bridge District |
| 1935 Residence (County) | Rockbridge |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Township / Ward | Natural Bridge District |
| Est. Birth Year | ~1891 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Kirby | Spouse | — | 49 | ~1891 |
| James Kirby | Son | — | 7 | ~1933 |
| William Kirby | Head | — | 48 | ~1892 |
Census Appearances
1920
Rockbridge, Virginia
Spouse, age 29
Rockbridge, Virginia · implied b. ~1891 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirby |
| Given Name | Mary S |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1930
Rockbridge, Virginia
Spouse, age 39
Rockbridge, Virginia · implied b. ~1891 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirby |
| Given Name | Mary E. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Virginia |
| Age at First Marriage | 17 |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Rockbridge-County, Virginia
Spouse, age 49
Rockbridge-County, Virginia · implied b. ~1891 — 3 household members
| Surname | Kirby |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | Natural Bridge District |
| 1935 Residence (County) | Rockbridge |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Kirby across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Kirby
Spouse · 1940 · age 49 · b. ~1891 · Virginia
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Rockbridge-County, Virginia
Open full size
1940 US Federal Census — Rockbridge-County, Virginia
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-04290-00416)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Samuel P. Smith | 89 | Grandfather | — | Virginia |
| 2 | Walter Lee Smith | 66 | Head | Wood Cutter | Virginia |
| 3 | Lizzie Brown | 50 | Housekeeper | Housekeeper | Canada-French |
| 4 | John H. Flint | 43 | Head | Farmer | Virginia |
| 5 | Ada Flint | 42 | Wife | — | Virginia |
| 6 | William Flint | 15 | Son | Farmer | Virginia |
| 7 | Maggie Flint | 10 | Daughter | — | Virginia |
| 8 | Archie Flint | 8 | Daughter | — | Virginia |
| 9 | John Flint | 4 | Son | — | Virginia |
| 10 | William Henry Kirby | 20 | Head | Farm Laborer | Virginia |
| 11 | Elizabeth Kirby | 23 | Wife | — | Virginia |
| 12 | Edith Mae Kirby | 2 | Daughter | — | Virginia |
| 13 | Clarence Carter | 33 | Head | Farmer | Virginia |
| 14 | Louisa Carter | 24 | Wife | — | Virginia |
| 15 | Clarence E. Carter | 6 | Son | — | Virginia |
| 16 | Shirley M. Carter | 3 | Son | — | Virginia |
| 17 | William Kirby | 48 | Head | Farmer | Virginia |
| 18 | Mary E. Kirby THIS PERSON | 49 | Wife | — | Virginia |
| 19 | James A. Kirby | 7 | Son | — | Virginia |
| 20 | Sally Bell | 69 | Head | — | Virginia |
| 21 | Edward Miller | 62 | Head | Farmer | Virginia |
| 22 | Alice Miller | 32 | Wife | — | Virginia |
| 23 | Julia Miller | 32 | Daughter | — | Virginia |
| 24 | Mable Miller | 27 | Daughter | Stenographer | Virginia |
| 25 | Murrell Miller | 20 | Son | Farm Laborer | Virginia |
| 26 | James Miller | 19 | Son | Farm Laborer | Virginia |
| 27 | Easter Broughman | 78 | Mother-in-law | — | Virginia |
| 28 | Eldred Dale | 39 | Head | Carpenter | Virginia |
| 29 | Manda Dale | 33 | Wife | — | Virginia |
| 30 | Clara Mae Dale | 11 | Daughter | — | Virginia |
| 31 | Elizabeth Dale | 10 | Daughter | — | Virginia |
| 32 | Alina Dale | 8 | Daughter | — | Virginia |
| 33 | Juanita Dale | 7 | Daughter | — | Virginia |
| 34 | Thelma Dale | 5 | Daughter | — | Virginia |
| 35 | John Dale | 3 | Son | — | Virginia |
| 36 | Charles Dale | 1 | Son | — | Virginia |
| 37 | Alva Nicely | 32 | Head | Farm Laborer | Virginia |
| 38 | Mary Nicely | 30 | Wife | — | Virginia |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)