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James Kirby — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Washington-County, Maryland
Our Model Tree links this James Kirby across the 1930 and 1940 US Censuses in Washington-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Maryland |
| Surname | Kirby |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (County) | R |
| Additional Details | |
| Highest Grade | No 4 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Dist 20 Downsville |
| Est. Birth Year | ~1929 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Frances Kirby | Daughter | — | 9 | ~1931 |
| Helen Kirby | Spouse | — | 30 | ~1910 |
| Ernest Kirby | Head | — | 35 | ~1905 |
| Paul Kirby | Son | — | 5 | ~1935 |
| Ernest Kirby | Son | — | 7 | ~1933 |
| Ronald Kirby | Son | — | 1 | ~1939 |
| Betty Kirby | Daughter | — | 2 | ~1938 |
| James Kirby | Son | — | 11 | ~1929 |
Census Appearances
1930
Washington, Maryland
Son, age
Washington, Maryland · implied b. ~1930 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Curby |
| Given Name | J Eugene |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Son, age 11
Washington-County, Maryland · implied b. ~1929 — 8 household members
| Surname | Kirby |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (County) | R |
| Highest Grade | No 4 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 James Kirby across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Kirby
Son · 1940 · age 11 · b. ~1929 · Maryland
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Sibling
Ernest Kirby
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Kirby
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Kirby
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Kirby
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ronald Kirby
Sibling · 1940 · age 1
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 — Washington-County, Maryland
Open full size
1940 US Federal Census — Washington-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01562-00680)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jean Miller | 1 | Daughter | — | Maryland |
| 2 | Ernest Kirby | 35 | Head | — | Maryland |
| 3 | Helen Kirby | 30 | Wife | — | Maryland |
| 4 | James Kirby THIS PERSON | 11 | Son | — | Maryland |
| 5 | Frances Kirby | 9 | Daughter | — | Maryland |
| 6 | Ernest Jr. Kirby | 7 | Son | — | Maryland |
| 7 | Paul Kirby | 5 | Son | — | Maryland |
| 8 | Betty Kirby | 2 | Daughter | — | Maryland |
| 9 | Ronald Kirby | 1 | Son | — | Maryland |
| 10 | Ellsworth Specher|Speicher | 44 | Head | 40 | Maryland |
| 11 | Mary Specher|Speicher | 43 | Wife | — | Maryland |
| 12 | Eleanore Specher|Speicher | 18 | Daughter | — | Maryland |
| 13 | Elmer Specher|Speicher | 16 | Son | — | Maryland |
| 14 | Josephine Specher|Speicher | 14 | Daughter | — | Maryland |
| 15 | Ray Specher|Speicher | 12 | Son | — | Maryland |
| 16 | Thelma Specher|Speicher | 11 | Daughter | — | Maryland |
| 17 | Fay Specher|Speicher | 9 | Daughter | — | Maryland |
| 18 | Ruby Specher|Speicher | 7 | Daughter | — | Maryland |
| 19 | Helen Specher|Speicher | 6 | Daughter | — | Maryland |
| 20 | Eugene Specher|Speicher | 5 | Son | — | Maryland |
| 21 | Iodine Specher|Speicher | 4 | Daughter | — | Maryland |
| 22 | Donald Lee Specher|Speicher | 2 | Son | — | Maryland |
| 23 | Nancy Specher|Speicher | 1 | Daughter | — | Maryland |
| 24 | Frank R. Dick | 53 | Head | — | Maryland |
| 25 | Naomi Dick | 15 | Daughter | — | Maryland |
| 26 | Walter R. Baker | 32 | Head | 48 | Maryland |
| 27 | Helen Baker | 25 | Wife | — | Maryland |
| 28 | David Baker | 8 | Son | — | Maryland |
| 29 | Janice Baker | 5 | Daughter | — | Maryland |
| 30 | James Baker | 3 | Son | — | Maryland |
| 31 | Alfred Dick | 57 | Head | 50 | Maryland |
| 32 | Ella Dick | 50 | Wife | — | Maryland |
| 33 | Forest Dick | 26 | Son | 40 | Maryland |
| 34 | Ellis Dick | 19 | Son | 65 | Maryland |
| 35 | Irvin Dick | 16 | Son | — | Maryland |
| 36 | Marie Dick | 14 | Daughter | — | Maryland |
| 37 | George Garrett | 26 | Head | 60 | Virginia |
| 38 | June Garrett | 26 | Wife | — | Maryland |
| 39 | Georgia Garrett | 4 | Daughter | — | Maryland |
| 40 | Harvey Leach | 32 | Head | 45 | Maryland |
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)