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John Mcnamara — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Mcnamara across the 1910 and 1920 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 11-person household.
Age 47
b. ~1873
Male
Head
Born: Massachusetts
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Middlesex, Massachusetts |
| Surname | McNamara |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Watchmaker |
| Industry | Watch Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Watchmaker |
| Township / Ward | Waltham City |
| Est. Birth Year | ~1873 |
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.
11 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Alice Mcnamara | Daughter | — | 14 | ~1906 |
| Margaret Mcnamara | Daughter | — | 4 | ~1916 |
| Helen Mcnamara | Daughter | — | 10 | ~1910 |
| Dorothy Mcnamara | Daughter | — | 15 | ~1905 |
| John Mcnamara | Head | — | 47 | ~1873 |
| Lawrence Mcnamara | Son | — | 8 | ~1912 |
| Francis Mcnamara | Son | — | 11 | ~1909 |
| Richard Mcnamara | Son | — | 1 | ~1919 |
| Henry Mcnamara | Son | — | 6 | ~1914 |
| John Mcnamara | Son | — | 13 | ~1907 |
| Bertha Mcnamara | Spouse | — | 36 | ~1884 |
Census Appearances
1910
Middlesex, Massachusetts
Head, age 36
Middlesex, Massachusetts · implied b. ~1874 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Years Married | 7 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Watchworker |
| Industry | Factory |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Head, age 47
Middlesex, Massachusetts · implied b. ~1873 — 11 household members
| Surname | McNamara |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Watchmaker |
| Industry | Watch Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| 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 John Mcnamara across 2 US Census years (1910 and 1920) in Middlesex, Massachusetts, using XGBoost record linkage.
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This person
Anchor record
John Mcnamara
Head · 1920 · age 47 · b. ~1873 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Middlesex, Massachusetts
Open full size
1920 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu719unit:0611)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Herbert C. Treadwell | 29 | Head | Tool-Maker | Massachusetts |
| 52 | Pauline E. Treadwell | 24 | Wife | Nickel Plater | Massachusetts |
| 53 | Pearl E. Treadwell | 8 | Daughter | — | Massachusetts |
| 54 | Herbert C. Treadwell | 4 | Son | — | Massachusetts |
| 55 | Eugene A. Conroy | 60 | Head | Gauge-Maker | Maine |
| 56 | Ida L. Conroy | 58 | Wife | — | Massachusetts |
| 57 | Roy Conroy | 33 | Son | Advertising Solicitor | Massachusetts |
| 58 | Margaret Conroy | 30 | Daughter-in-law | — | Massachusetts |
| 59 | Thomas Mcart | 57 | Head | Stationary Engineer | Canada |
| 60 | Alice Mcart | 52 | Wife | — | Canada |
| 61 | John E. Mcart | 20 | Son | Supercargo | Massachusetts |
| 62 | Mary E. Mcart | 15 | Daughter | — | Massachusetts |
| 63 | Patrick Kelly | 56 | Head | Watchman | Ireland |
| 64 | Margaret Kelly | 51 | Wife | — | Ireland |
| 65 | Joseph J. Kelly | 26 | Son | Book-Keeper | Massachusetts |
| 66 | John H. Lally | 60 | Head | Jeweler | Massachusetts |
| 67 | Winnifred G. Lally | 60 | Wife | — | Massachusetts |
| 68 | Sophia Lally | 26 | Daughter | Stenographer | Massachusetts |
| 69 | Gertrude Lally | 24 | Daughter | Stenographer | Massachusetts |
| 70 | Katherine Lally | 20 | Daughter | Stenographer | Massachusetts |
| 71 | John J. Mcnamara THIS PERSON | 47 | Head | Watchmaker | Massachusetts |
| 72 | Bertha Mcnamara | 36 | Wife | — | Maine |
| 73 | Dorothy Mcnamara | 15 | Daughter | — | Massachusetts |
| 74 | Alice Mcnamara | 14 | Daughter | — | Massachusetts |
| 75 | John Mcnamara | 13 | Son | — | Massachusetts |
| 76 | Francis Mcnamara | 11 | Son | — | Massachusetts |
| 77 | Helen Mcnamara | 10 | Daughter | — | Massachusetts |
| 78 | Lawrence Mcnamara | 8 | Son | — | Massachusetts |
| 79 | Henry Mcnamara | 6 | Son | — | Massachusetts |
| 80 | Margaret Mcnamara | 4 | Daughter | — | Massachusetts |
| 81 | Richard Mcnamara | 1 | Son | — | Massachusetts |
| 82 | Margaret Moynihan | 48 | Head | — | Ireland |
| 83 | Catherine Moynihan | 24 | Daughter | Watch Maker | Massachusetts |
| 84 | John Moynihan | 23 | Son | Tallyer | Massachusetts |
| 85 | Mary Moynihan | 19 | Daughter | Stenographer | Massachusetts |
| 86 | John C. Duffy | 71 | Head | Gate Tender | Ireland |
| 87 | Mary E. Duffy | 44 | Daughter | — | Massachusetts |
| 88 | Margaret E. Duffy | 34 | Daughter | Assembler | Massachusetts |
| 89 | Daniel Spillane | 37 | Head | Foreman | Massachusetts |
| 90 | Edith Spillane | 33 | Wife | — | Massachusetts |
| 91 | Helen Spillane | 4 | Daughter | — | Massachusetts |
| 92 | Beatrice Lillian Spillane | 2 | Daughter | — | Massachusetts |
| 93 | John J. Clifford | 42 | Head | Machine Operator | Massachusetts |
| 94 | Charles R. Corbett | 57 | Head | Watchmaker | Canada |
| 95 | Nellie Corbett | 55 | Wife | — | Maine |
| 96 | Raymond Corbett | 27 | Son | Assistant | Massachusetts |
| 97 | Hattie Corbett | 25 | Daughter | Assembler | Massachusetts |
| 98 | Marie Corbett | 23 | Daughter | Clerk | Massachusetts |
| 99 | Paul Corbett | 18 | Son | Clerk | Massachusetts |
| 100 | Carl Corbett | 16 | Son | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)