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Mary Monahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Monahan across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1906), then head of a 9-person household.
Age 34
b. ~1906
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Monahan |
| Given Name | Mary D |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1906 |
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 |
|---|---|---|---|---|
| George Monahan | Son | — | 7 | ~1933 |
| Mary Monahan | Daughter | — | 4 | ~1936 |
| William Monahan | Son | — | 6 | ~1934 |
| Mary Monahan | Spouse | — | 34 | ~1906 |
| James Monahan | Son | — | ~1940 | |
| Regis Monahan | Daughter | — | 2 | ~1938 |
| Rose Monahan | Daughter | — | 11 | ~1929 |
| Edward Monahan | Son | — | 9 | ~1931 |
| John Monahan | Son | — | 10 | ~1930 |
Census Appearances
1930
Suffolk, Massachusetts
Other, age 24
Suffolk, Massachusetts · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | Mary R. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 22 |
| Father's Birthplace | Canada-English |
| Mother's Birthplace | Canada-French |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Spouse, age 34
Suffolk-County, Massachusetts · implied b. ~1906 — 9 household members
| Surname | Monahan |
| Given Name | Mary D |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Hours Worked | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Monahan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Monahan
Spouse · 1940 · age 34 · b. ~1906 · 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-t0627-01673-00450)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary D Monahan THIS PERSON | 34 | Wife | — | Massachusetts |
| 2 | Rose E Monahan | 11 | Daughter | — | Massachusetts |
| 3 | John A Monahan | 10 | Son | — | Massachusetts |
| 4 | Edward F Monahan | 9 | Son | — | Massachusetts |
| 5 | George F Monahan | 7 | Son | — | Massachusetts |
| 6 | William J Monahan | 6 | Son | — | Massachusetts |
| 7 | Mary B Monahan | 4 | Daughter | — | Massachusetts |
| 8 | Regis C Monahan | 2 | Daughter | — | Massachusetts |
| 9 | James A Monahan | 0 | Son | — | Massachusetts |
| 10 | Ann E Barry | 71 | Head | — | Canada English |
| 11 | Mary K Barry | 29 | Daughter | Bookkeeper | Massachusetts |
| 12 | Charles A Benson | 46 | Head | Gas Station Owner | Russia |
| 13 | Jean Benson | 42 | Wife | — | Russia |
| 14 | Ruth Benson | 22 | Daughter | Clerk | Massachusetts |
| 15 | Shirley Benson | 21 | Daughter | Hairdresser | Massachusetts |
| 16 | Lillian Benson | 18 | Daughter | Hairdresser | Massachusetts |
| 17 | Emile Ricard | 63 | Head | Yard Brakeman | Rhode Island |
| 18 | Delima Ricard | 61 | Wife | — | Canada French |
| 19 | Yvonne C Ricard | 40 | Daughter | Dressmaker | Rhode Island |
| 20 | George A Ricard | 25 | Son | Laborer | Massachusetts |
| 21 | Morris B Bernstein | 31 | Head | Teacher | New York |
| 22 | Pauline Bernstein | 30 | Wife | — | Russia |
| 23 | Noel M Bernstein | 3 | Son | — | New York |
| 24 | Nathan Rosenthal | 56 | Head | Male Nurse | Poland |
| 25 | Ethel Rosenthal | 54 | Wife | — | Ireland |
| 26 | Seymour Rosenthal | 24 | Son | — | Massachusetts |
| 27 | Albin Rosenthal | 20 | Son | Office Clerk | Massachusetts |
| 28 | Armenag Apakian | 67 | Head | Shoe Maker | Armenia |
| 29 | Armenag Apakian | 62 | Wife | Grocer | Armenia |
| 30 | Martin Apakian | 27 | Son | Machinist | Massachusetts |
| 31 | Randall H Flewelling | 35 | Head | Shipper | Massachusetts |
| 32 | Marion D Flewelling | 30 | Wife | Waitress | Massachusetts |
| 33 | Rogers Flewelling | 3 | Son | — | Massachusetts |
| 34 | Elizabeth E Lyons | 59 | Head | — | Massachusetts |
| 35 | Paul J Lyons | 25 | Son | District Manager | Massachusetts |
| 36 | Mary Lyons | 27 | Daughter | Saleslady | Massachusetts |
| 37 | Edmund Gill | 51 | Lodger | — | Irish Free State |
| 38 | Arthur Stevens | 42 | Head | Machinist | British West Indies |
| 39 | Agnes Stevens | 34 | Wife | — | Massachusetts |
| 40 | Robert Stevens | 15 | Son | — | Massachusetts |
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)