MK
Mary Kirby — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Morgan-County, Alabama
Our Model Tree links this Mary Kirby across the 1930 and 1940 US Censuses in Morgan-County, Alabama (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Female
Daughter
Born: Alabama
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Morgan-County, Alabama |
| Surname | Kirby |
| Given Name | Mary Lee |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Morgan |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Alabama |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Township / Ward | Precinct 16 |
| Est. Birth Year | ~1930 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Percy Kirby | Son | — | 9 | ~1931 |
| Louise Kirby | Daughter | — | 13 | ~1927 |
| Ruthie Kirby | Daughter | — | 2 | ~1938 |
| Ida Kirby | Spouse | — | 32 | ~1908 |
| Faye Kirby | Daughter | — | 7 | ~1933 |
| Percy Kirby | Head | — | 32 | ~1908 |
| Joe Kirby | Son | — | ~1940 | |
| Mary Kirby | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Morgan, Alabama
Daughter, age 1
Morgan, Alabama · implied b. ~1929 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirby |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Morgan-County, Alabama
Daughter, age 10
Morgan-County, Alabama · implied b. ~1930 — 8 household members
| Surname | Kirby |
| Given Name | Mary Lee |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Morgan |
| Highest Grade | No 3 |
| 1935 Residence | Alabama |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kirby
Daughter · 1940 · age 10 · b. ~1930 · Alabama
★ You are viewing this record
Sibling
Faye Kirby
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruthie Kirby
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Kirby
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joe Kirby
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Percy Kirby
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Morgan-County, Alabama
Open full size
1940 US Federal Census — Morgan-County, Alabama
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00072-00554)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arthur Glenn | 17 | Son | Farm Labour | Alabama |
| 42 | Lottie Glenn | 15 | Daughter | 0 | Alabama |
| 43 | Arline Glenn | 13 | Daughter | 0 | Alabama |
| 44 | Willodeen Glenn | 9 | Daughter | — | Alabama |
| 45 | Jenkins J. Mcdaniel | 30 | Head | Farm Labour | Alabama |
| 46 | Ellen Mcdaniel | 29 | Wife | 0 | Alabama |
| 47 | John C. Mcdaniel | 6 | Son | — | Alabama |
| 48 | William A. Mcdaniel | 12 | Son | — | Alabama |
| 49 | Percy K. Kirby | 32 | Head | Mill Labour | Alabama |
| 50 | Ida Kirby | 32 | Wife | 0 | Alabama |
| 51 | Louise Kirby | 13 | Daughter | — | Alabama |
| 52 | Mary Lee Kirby THIS PERSON | 10 | Daughter | — | Alabama |
| 53 | Percy Thomas Kirby | 9 | Son | — | Alabama |
| 54 | Faye Kirby | 7 | Daughter | — | Alabama |
| 55 | Ruthie Jean Kirby | 2 | Daughter | — | Alabama |
| 56 | Joe Kirby | 0 | Son | — | Alabama |
| 57 | Mack King | 58 | Head | Farmer | Alabama |
| 58 | Maggie King | 42 | Wife | 0 | Alabama |
| 59 | Ruby King | 18 | Daughter | Farm Labour | Alabama |
| 60 | Martha Dell King | 11 | Daughter | 0 | Alabama |
| 61 | Billy King | 2 | Son | — | Alabama |
| 62 | Paul King | 33 | Son | Labourer Hosiery Mill | Alabama |
| 63 | Robert Mcabee | 29 | Head | Farmer | Alabama |
| 64 | Elsie Mcabee | 30 | Wife | 0 | Alabama |
| 65 | Doris Mcabee | 9 | Daughter | — | Alabama |
| 66 | Edwina Mcabee | 7 | Daughter | — | Alabama |
| 67 | Claude Williams | 44 | Head | Rock Labour | Alabama |
| 68 | Mollie Williams | 50 | Wife | 0 | Georgia |
| 69 | V. A. White | 42 | Head | Farmer | Alabama |
| 70 | Ira White | 42 | Wife | 0 | Alabama |
| 71 | Elmer White | 23 | Son | Farm Labour | Alabama |
| 72 | Hoyt White | 16 | Son | 0 | Alabama |
| 73 | Alene White | 13 | Daughter | 0 | Alabama |
| 74 | Hal White | 8 | Son | — | Alabama |
| 75 | Eldon L. Long | 29 | Head | Farm Labour | Alabama |
| 76 | Ruby Long | 25 | Wife | 0 | Alabama |
| 77 | Eldreen Long | 8 | Daughter | — | Alabama |
| 78 | Luvodis Long | 6 | Son | — | Alabama |
| 79 | Bobby Long | 3 | Son | — | Alabama |
| 80 | Aldean Long | 1 | Son | — | Alabama |
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)