MS
Michael Sullivan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Michael Sullivan across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1900), then head of a 9-person household.
Age 40
b. ~1900
Male
Head
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Sullivan |
| Given Name | Michael J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Steam Fitter |
| Industry | Brewery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2900 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
| Occupation | Steam Fitter |
| Township / Ward | Boston |
| Est. Birth Year | ~1900 |
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 Michael | Age | Birth yr |
|---|---|---|---|---|
| Sheila Sullivan | Daughter | — | 4 | ~1936 |
| Theresa Sullivan | Daughter | — | 7 | ~1933 |
| Marion Sullivan | Daughter | — | 16 | ~1924 |
| Helen Sullivan | Daughter | — | 2 | ~1938 |
| Michael Sullivan | Head | — | 40 | ~1900 |
| John Sullivan | Son | — | 8 | ~1932 |
| Joseph Sullivan | Son | — | 18 | ~1922 |
| Thomas Sullivan | Son | — | 11 | ~1929 |
| Helen Sullivan | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Middlesex, Massachusetts
Other, age 30
Middlesex, Massachusetts · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Michael J |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Irish Free State |
| Naturalization Status | First papers filed |
| Year of Immigration | 1926 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Creamery Worker |
| Industry | Milk Company |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | irish free state |
1940
Suffolk-County, Massachusetts
Head, age 40
Suffolk-County, Massachusetts · implied b. ~1900 — 9 household members
| Surname | Sullivan |
| Given Name | Michael J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Occupation | Steam Fitter |
| Industry | Brewery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2900 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
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 Michael Sullivan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Michael Sullivan
Head · 1940 · age 40 · b. ~1900 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01679-00012)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorothy Early | 5 | Daughter | — | Massachusetts |
| 2 | Robert Early | 1 | Son | — | Massachusetts |
| 3 | Michael J. Sullivan THIS PERSON | 40 | Head | Steam Fitter | Irish Free State |
| 4 | Helen Sullivan | 38 | Wife | — | Massachusetts |
| 5 | Joseph Sullivan | 18 | Son | — | Massachusetts |
| 6 | Marion Sullivan | 16 | Daughter | — | Massachusetts |
| 7 | Thomas Sullivan | 11 | Son | — | Massachusetts |
| 8 | John Sullivan | 8 | Son | — | Massachusetts |
| 9 | Theresa Sullivan | 7 | Daughter | — | Massachusetts |
| 10 | Sheila Sullivan | 4 | Daughter | — | Massachusetts |
| 11 | Helen Sullivan | 2 | Daughter | — | Massachusetts |
| 12 | David Adams | 64 | Head | Truck Dispatcher | Canada-English |
| 13 | Bessie Adams | 54 | Wife | — | Massachusetts |
| 14 | Adelaide Adams | 28 | Daughter | Billing Clerk | Massachusetts |
| 15 | Grace Adams | 20 | Daughter | Secretary | Massachusetts |
| 16 | William Haasis | 66 | Head | — | Germany |
| 17 | Elizabeth Haasis | 66 | Wife | — | Germany |
| 18 | Frederick Haasis | 30 | Son | Printer | Massachusetts |
| 19 | Edward Haasis | 22 | Son | Printer | Massachusetts |
| 20 | Helen Waters | 37 | Daughter | Elevator Operator | Massachusetts |
| 21 | Helen Waters | 15 | Granddaughter | — | Massachusetts |
| 22 | Leo Waters | 13 | Grandson | — | Massachusetts |
| 23 | Fred. K. Naddad | 34 | Head | Surgical Doctor | Massachusetts |
| 24 | Rahel Naddad | 65 | Father | — | Syria |
| 25 | Nellie Naddad | 51 | Mother | — | Syria |
| 26 | Elvis Naddad | 29 | Brother | Drug Clerk | Massachusetts |
| 27 | Josephine Naddad | 25 | Sister | — | Maine |
| 28 | Edward Emmer | 49 | Head | Foreman Die Cutter | England |
| 29 | Josepha M. Emmer | 45 | Wife | — | Massachusetts |
| 30 | Marjory Emmer | 18 | Daughter | — | Massachusetts |
| 31 | Lewis S.A. Drysdale | 50 | Head | Ice Crusher | Canada-English |
| 32 | Louise M. Drysdale | 43 | Wife | — | Massachusetts |
| 33 | Anna Uolass | 77 | Mother-in-law | — | Pennsylvania |
| 34 | Max Uolass | 36 | Brother-in-law | Painter | Massachusetts |
| 35 | James T. Mcmullen | 50 | Head | Boiler Maker | New York |
| 36 | Loretta Mcmullen | 43 | Wife | — | Canada-English |
| 37 | Mary L. Mcmullen | 10 | Daughter | — | Massachusetts |
| 38 | Daniel J. Mcmullen | 8 | Son | — | Massachusetts |
| 39 | Duncan Macdonald | 41 | Head | Policeman | Massachusetts |
| 40 | Anna Macdonald | 77 | Mother | — | Canada-English |
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)