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William Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dakota-County, Minnesota
Our Model Tree links this William Sullivan across the 1920, 1930 and 1940 US Censuses in Dakota-County, Minnesota (XGBoost, ~Confirmed), with identified parents Patrick & Catherine — first a head (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Male
Head
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Dakota-County, Minnesota |
| Surname | Sullivan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Dakota |
| Additional Details | |
| Occupation | Day Laborer |
| Industry | Cattle Dealer |
| Class of Worker | OA |
| Hours Worked | 84 |
| Income (1939) | 60 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Laborer |
| Township / Ward | Lakeville Township |
| Est. Birth Year | ~1909 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Mary Sullivan | Daughter | — | 2 | ~1938 |
| William Sullivan | Head | — | 31 | ~1909 |
| Thomas Sullivan | Son | — | 1 | ~1939 |
| Eleanor Sullivan | Spouse | — | 24 | ~1916 |
Census Appearances
1920
Dakota, Minnesota
Son, age 11
Dakota, Minnesota · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Kentucky |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Dakota, Minnesota
Son, age 21
Dakota, Minnesota · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Kentucky |
| Occupation | Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Dakota-County, Minnesota
Head, age 31
Dakota-County, Minnesota · implied b. ~1909 — 4 household members
| Surname | Sullivan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Dakota |
| Occupation | Day Laborer |
| Industry | Cattle Dealer |
| Class of Worker | OA |
| Hours Worked | 84 |
| Income (1939) | 60 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 William Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Patrick Sullivan (~0.92 confidence) and mother Catherine Sullivan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Patrick Sullivan
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Catherine Sullivan
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Sullivan
Head · 1940 · age 31 · b. ~1909 · Minnesota
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Dakota-County, Minnesota
Open full size
1940 US Federal Census — Dakota-County, Minnesota
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01917-00430)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alice Morgan | 41 | Wife | — | Minnesota |
| 42 | Albert Krejce | 40 | Head | Farmer | Minnesota |
| 43 | Evelyn Krejce | 29 | Wife | — | So. Dakota |
| 44 | Verne Krejce | 10 | Son | — | Minnesota |
| 45 | Gene Krejce | 5 | Son | — | Minnesota |
| 46 | Anthony Krejce | 4 | Son | — | Minnesota |
| 47 | William Krejce | 23 | Brother | Farm Laborer | Minnesota |
| 48 | Pat Sullivan | 72 | Head | Farm Proprietor | Pennsylvania |
| 49 | Catherine Sullivan | 69 | Wife | — | Kentucky |
| 50 | Frank Williams | 38 | Hired man | Farm Laborer | No. Dakota |
| 51 | William Sullivan THIS PERSON | 31 | Head | Day Laborer | Minnesota |
| 52 | Eleanor Sullivan | 24 | Wife | — | Minnesota |
| 53 | Mary Eleanor Sullivan | 2 | Daughter | — | Minnesota |
| 54 | Thomas Sullivan | 1 | Son | — | Minnesota |
| 55 | George Sullivan | 36 | Head | Farm Proprietor | Minnesota |
| 56 | Susan Sullivan | 37 | Wife | — | Minnesota |
| 57 | Robert Sullivan | 11 | Son | — | Minnesota |
| 58 | Patrick Sullivan | 8 | Son | — | Minnesota |
| 59 | Maureen Sullivan | 4 | Daughter | — | Minnesota |
| 60 | James Milan | 48 | Head | Farm Proprietor | Minnesota |
| 61 | Esther Milan | 43 | Wife | — | Minnesota |
| 62 | Helen Mae Milan | 17 | Daughter | — | Minnesota |
| 63 | Donald Milan | 14 | Son | — | Minnesota |
| 64 | Gordon Sayer | 35 | Head | Deputy Sheriff | Minnesota |
| 65 | Sylvia Sayer | 29 | Wife | — | Minnesota |
| 66 | Gordon Lindsay Sayer | 3 | Son | — | Minnesota |
| 67 | Albert Sayer | 66 | Head | Farm Proprietor | Minnesota |
| 68 | Trine Sayer | 63 | Wife | — | Minnesota |
| 69 | Clarence Zimmerman | 39 | Hired man | Laborer | New York |
| 70 | Anton Gjerre | 39 | Head | Clergy | Minnesota |
| 71 | Josephine Gjerre | 39 | Wife | — | Wisconsin |
| 72 | Paul Gjerre | 11 | Son | — | So. Dakota |
| 73 | Alden Gjerre | 9 | Son | — | So. Dakota |
| 74 | John Gjerre | 5 | Son | — | Minnesota |
| 75 | Philip Gjerre | 1 | Son | — | Minnesota |
| 76 | Wilbur Frank | 32 | Head | Part Owner | California |
| 77 | Clara Frank | 31 | Wife | — | Minnesota |
| 78 | Carol Frank | 2 | Daughter | — | Minnesota |
| 79 | Estelle Smith | 64 | Head | — | Minnesota |
Related Census Records
Pedigree Summary
William
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)