MJ
Mary Jacobs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Prince-William-County, Virginia
Our Model Tree links this Mary Jacobs across the 1930 and 1940 US Censuses in Prince-William-County, Virginia (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 9-person household.
Age 16
b. ~1924
Female
Daughter
Born: Virginia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Prince-William-County, Virginia |
| Surname | Jacobs |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Gainesville Magisterial District |
| 1935 Residence (County) | Prince William |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Township / Ward | Gainesville Magisterial District |
| Est. Birth Year | ~1924 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Jacobs | Daughter | — | 16 | ~1924 |
| Marjorie Jacobs | Daughter | — | 1 | ~1939 |
| Bessie Jacobs | Daughter | — | 12 | ~1928 |
| Doris Jacobs | Daughter | — | 9 | ~1931 |
| Moss Jacobs | Head | — | 47 | ~1893 |
| Gordon Jacobs | Son | — | 15 | ~1925 |
| Moss Jacobs | Son | — | 11 | ~1929 |
| Perry Jacobs | Son | — | 13 | ~1927 |
| Agness Jacobs | Spouse | — | 35 | ~1905 |
Census Appearances
1930
Prince William, …
Daughter, age 6
Prince William, Virginia · implied b. ~1924 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobs |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Prince-William-County, Virginia
Daughter, age 16
Prince-William-County, Virginia · implied b. ~1924 — 9 household members
| Surname | Jacobs |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Gainesville Magisterial District |
| 1935 Residence (County) | Prince William |
| Highest Grade | No 7 |
| 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 Jacobs across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Jacobs
Daughter · 1940 · age 16 · b. ~1924 · Virginia
★ You are viewing this record
Sibling
Marjorie Jacobs
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bessie Jacobs
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Perry Jacobs
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Jacobs
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Moss Jacobs
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gordon Jacobs
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 — Prince-William-County, Virginia
Open full size
1940 US Federal Census — Prince-William-County, Virginia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04286-00327)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Phoebe Peak | 44 | Wife | — | Virginia |
| 2 | Douglas Peak | 13 | Son | — | Virginia |
| 3 | Roda Peak | 10 | Daughter | — | Virginia |
| 4 | Ora Peak | 7 | Daughter | — | Virginia |
| 5 | Clifford Dixon | 20 | Son-in-law | Laborer | North Carolina |
| 6 | Jennie Dixon | 21 | Daughter | — | Virginia |
| 7 | Elmer Peak | 19 | Nephew | Laborer | Virginia |
| 8 | Oakley Bowers | 23 | Lodger | Laborer | Virginia |
| 9 | Guy Bowers | 20 | Lodger | Laborer | Virginia |
| 10 | Herman Pearson | 54 | Head | Laborer | Virginia |
| 11 | Corrie Pearson | 47 | Wife | Housekeeper | Virginia |
| 12 | Dudley Gaskins | 47 | Head | Laborer | Virginia |
| 13 | Hattie Gaskins | 52 | Wife | — | Virginia |
| 14 | Milton Gaskins | 30 | Son | Laborer | Virginia |
| 15 | Wade Gaskins | 23 | Son | Butler | Virginia |
| 16 | Naomi Gaskins | 17 | Daughter | — | Virginia |
| 17 | Harold Gaskins | 14 | Son | — | Virginia |
| 18 | Lawrence Williams | 18 | Nephew | — | Virginia |
| 19 | Strother Murray | 70 | Head | — | Virginia |
| 20 | Susie Guilliam | 68 | Sister | — | Virginia |
| 21 | Temple Murray | 23 | Brother | Laborer | Virginia |
| 22 | Cyril Fogle | 44 | Head | Manager | Missouri |
| 23 | Gladys Fogle | 38 | Wife | — | West Virginia |
| 24 | Robert Fogle | 16 | Son | — | Indiana |
| 25 | Betty Jane Fogle | 7 | Daughter | — | Virginia |
| 26 | John Fogle | 3 | Son | — | Virginia |
| 27 | Joan Fogle | 1 | Daughter | — | Virginia |
| 28 | Moss Jacobs | 47 | Head | — | Virginia |
| 29 | Agness Jacobs | 35 | Wife | — | Columbia |
| 30 | Mary Jacobs THIS PERSON | 16 | Daughter | — | Virginia |
| 31 | Gordon Jacobs | 15 | Son | — | Virginia |
| 32 | Perry Jacobs | 13 | Son | — | Virginia |
| 33 | Bessie Jacobs | 12 | Daughter | — | Virginia |
| 34 | Moss Jacobs | 11 | Son | — | Virginia |
| 35 | Doris Jacobs | 9 | Daughter | — | Virginia |
| 36 | Marjorie Jacobs | 1 | Daughter | — | Virginia |
| 37 | John Carum | 40 | Head | — | Virginia |
| 38 | Margaret Carum | 25 | Wife | — | Virginia |
| 39 | Charlotte Carum | 9 | Daughter | — | Virginia |
| 40 | Clarence Carum | 7 | Son | — | 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)