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John Byrne — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Byrne across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1913), then head of a 11-person household.
Age 27
b. ~1913
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Byrne |
| Given Name | John M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | chauffeur |
| Industry | Transportation |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1348 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Chauffeur |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1913 |
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 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Byrne | Daughter | — | 16 | ~1924 |
| Thomas Byrne | Son | — | 23 | ~1917 |
| William Byrne | Son | — | 21 | ~1919 |
| Genevieve Byrne | Daughter | — | 14 | ~1926 |
| Alfred Byrne | Son | — | 11 | ~1929 |
| John Byrne | Son | — | 27 | ~1913 |
| Catherine Byrne | Daughter | — | 18 | ~1922 |
| Margaret Byrne | Daughter | — | 25 | ~1915 |
| Ann Byrne | Daughter | — | 8 | ~1932 |
| Edward Byrne | Son | — | 20 | ~1920 |
| Catherine Byrne | Head | — | 50 | ~1890 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 17
Middlesex, Massachusetts · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Byrne |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 27
Middlesex-County, Massachusetts · implied b. ~1913 — 11 household members
| Surname | Byrne |
| Given Name | John M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Occupation | chauffeur |
| Industry | Transportation |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1348 |
| 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 John Byrne across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Byrne
Son · 1940 · age 27 · b. ~1913 · Massachusetts
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Sibling
Catherine Byrne
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Byrne
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Byrne
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Byrne
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Byrne
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Byrne
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Byrne
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Genevieve Byrne
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Byrne
Sibling · 1940 · age 20
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01702-00704)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clinton R. Warren | 24 | Head | Meat Cutter | Canada-English |
| 2 | Dorothy F. Warren | 21 | Wife | — | Massachusetts |
| 3 | Herbert H. Warren | 26 | Brother-in-law | Laborer | Massachusetts |
| 4 | Lucy E. Warren | 41 | Mother-in-law | Stitcher | Massachusetts |
| 5 | Judith L. Warren | 1 | Daughter | — | Massachusetts |
| 6 | Bridget Mcdonough | 60 | Head | — | Ireland-North |
| 7 | John J. Mcdonough | 29 | Son | Laborer | Massachusetts |
| 8 | Catherine F. Mcdonough | 22 | Daughter | Clerk | Massachusetts |
| 9 | Florence Vreeland | 41 | Head | Commissionary | Lithuania |
| 10 | Harriet B. Vreeland | 15 | Son | — | Massachusetts |
| 11 | William H. Vreeland | 11 | Son | — | Massachusetts |
| 12 | Sally F. Dargin | 29 | Sister | Counter Girl | Massachusetts |
| 13 | James R. Mullen | 65 | Head | Chauffeur | Massachusetts |
| 14 | Mary A. Mullen | 53 | Wife | — | Parochial |
| 15 | Albert J. Mullen | 27 | Son | Janitor | Massachusetts |
| 16 | Dorothy G. Mullen | 27 | Daughter | Clerk | Massachusetts |
| 17 | Edna M. Mullen | 20 | Daughter | Clerk | Massachusetts |
| 18 | Robert H. Gorman | 23 | Head | Clerk | Massachusetts |
| 19 | Catherine F. Gorman | 23 | Wife | — | Massachusetts |
| 20 | Robert M. Gorman | 2 | Son | — | Massachusetts |
| 21 | Catherine Byrne | 50 | Head | — | Northern Ireland |
| 22 | John M. Byrne THIS PERSON | 27 | Son | Chauffeur | Massachusetts |
| 23 | Margaret E. Byrne | 25 | Daughter | Clerk | Massachusetts |
| 24 | Thomas F. Byrne | 23 | Son | Laborer | Massachusetts |
| 25 | William F. Byrne | 21 | Son | — | Massachusetts |
| 26 | Edward J. Byrne | 20 | Son | Wringer | Massachusetts |
| 27 | Catherine P. Byrne | 18 | Daughter | Laborer | Massachusetts |
| 28 | Elizabeth M. Byrne | 16 | Daughter | — | Massachusetts |
| 29 | Genevieve Byrne | 14 | Daughter | — | Massachusetts |
| 30 | Alfred F. Byrne | 11 | Son | — | Massachusetts |
| 31 | Ann T. Byrne | 8 | Daughter | — | Massachusetts |
| 32 | Jeremiah E. Maloney | 44 | Head | Baker | Massachusetts |
| 33 | Anna D. Maloney | 36 | Wife | — | Massachusetts |
| 34 | Mary M. Maloney | 15 | Daughter | — | Massachusetts |
| 35 | Teresa Maloney | 13 | Daughter | — | Massachusetts |
| 36 | Catherine Carter | 64 | Mother-in-law | — | North Ireland |
| 37 | William D. Bennett | 40 | Head | Nurse | Massachusetts |
| 38 | Gertrude E. Bennett | 35 | Wife | Chauffeur | New Hampshire |
| 39 | Marian F. Bennett | 18 | Daughter | — | Massachusetts |
| 40 | William G. Bennett | 16 | Son | — | Massachusetts |
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)