IT
Irene Thompson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Irene Thompson across the 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Thompson |
| Given Name | Irene L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Frederick City |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Frederick City |
| Est. Birth Year | ~1928 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Irene | Age | Birth yr |
|---|---|---|---|---|
| James Thompson | Son | — | 4 | ~1936 |
| Leroy Thompson | Head | — | 40 | ~1900 |
| Albert Thompson | Son | — | 18 | ~1922 |
| Geraldine Thompson | Daughter | — | 9 | ~1931 |
| Irene Thompson | Daughter | — | 12 | ~1928 |
| Herbert Thompson | Son | — | 7 | ~1933 |
| Henrietta Thompson | Spouse | — | 41 | ~1899 |
| Charles Thompson | Son | — | 15 | ~1925 |
| Johnny Thompson | Son | — | 21 | ~1919 |
Census Appearances
1930
Frederick, Maryland
Daughter, age 2
Frederick, Maryland · implied b. ~1928 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Irene |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Daughter, age 12
Frederick-County, Maryland · implied b. ~1928 — 9 household members
| Surname | Thompson |
| Given Name | Irene L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Frederick City |
| 1935 Residence (County) | Frederick |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| 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 Irene Thompson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Irene Thompson
Daughter · 1940 · age 12 · b. ~1928 · Maryland
★ You are viewing this record
Sibling
Herbert Thompson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geraldine Thompson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Johnny Thompson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Thompson
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Thompson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Thompson
Sibling · 1940 · age 15
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 — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01548-00169)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas E. Naylor | 23 | Head | Laborer | Maryland |
| 42 | Nettie P. Naylor | 20 | Wife | Maid | Maryland |
| 43 | Thomas E. Naylor | 2 | Son | — | Maryland |
| 44 | Margaret S. Naylor | 0 | Daughter | — | Maryland |
| 45 | Effie L. Herbert | 38 | Head | Maid | Maryland |
| 46 | Anita M. Herbert | 19 | Daughter | Maid | Maryland |
| 47 | Mary Ellen Herbert | 8 | Daughter | — | Maryland |
| 48 | Bertha Robinson | 41 | Head | Maid | Maryland |
| 49 | Mildred Diggs | 13 | Daughter | — | Maryland |
| 50 | Edward H. Diggs | 10 | Son | — | Maryland |
| 51 | James J. Mathaott | 36 | Lodger | Truck Driver | Maryland |
| 52 | Robert Dutrow | 40 | Head | Laborer | Maryland |
| 53 | Daisy Ambush | 27 | Lodger | Maid | Maryland |
| 54 | Bertie Boins | 32 | Head | Seamstress | Maryland |
| 55 | Charles E. Boins | 13 | Son | — | Maryland |
| 56 | Lillian V. Boins | 11 | Daughter | — | Maryland |
| 57 | William Mathew | 38 | Lodger | Laborer | Maryland |
| 58 | Nathan Ogle | 24 | Head | Laborer | Maryland |
| 59 | Mamie Ogle | 29 | Wife | Maid | Maryland |
| 60 | Ellie D. Page | 31 | Lodger | Laborer | Maryland |
| 61 | Floyd Jones | 36 | Head | Laborer | West Virginia |
| 62 | Joseph Brown | 21 | Lodger | Laborer | Maryland |
| 63 | Harriet Lewis | 20 | Lodger | Maid | Maryland |
| 64 | Chester Ogle | 25 | Head | Laborer | Maryland |
| 65 | Mary Hopkins | 22 | Lodger | Maid | Maryland |
| 66 | Joseph Ogle | 59 | Head | Laborer | Maryland |
| 67 | Leroy Thompson | 40 | Head | Laborer | Maryland |
| 68 | Henrietta Thompson | 41 | Wife | Maid | Maryland |
| 69 | Johnny E. Thompson | 21 | Son | Laborer | Maryland |
| 70 | Albert L. Thompson | 18 | Son | Laborer | Maryland |
| 71 | Charles D. Thompson | 15 | Son | Student | Maryland |
| 72 | Irene L. Thompson THIS PERSON | 12 | Daughter | — | Maryland |
| 73 | Geraldine Thompson | 9 | Daughter | — | Maryland |
| 74 | Herbert D. Thompson | 7 | Son | — | Maryland |
| 75 | James D. Thompson | 4 | Son | — | Maryland |
| 76 | Nathaniel D. Vogle | 49 | Head | Farm Laborer | Maryland |
| 77 | Matthew Smith | 25 | Lodger | Maid | Maryland |
| 78 | Teresa M. White | 52 | Head | Maid | Maryland |
| 79 | Richard S. White | 22 | Son | Laborer | Maryland |
| 80 | Kathryn R. White | 15 | Daughter | Maid | Maryland |
Related Census Records
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)