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John Byrne — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegany-County, Maryland
Our Model Tree links this John Byrne across the 1930 and 1940 US Censuses in Allegany-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 9-person household.
Age 17
b. ~1923
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegany-County, Maryland |
| Surname | Byrne |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Ocean Md. |
| 1935 Residence (County) | Allegany |
| Additional Details | |
| Occupation | New Worker |
| Industry | N.Y.A. |
| Class of Worker | GW |
| Hours Worked | 2 |
| Income (1939) | 36 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | New Worker |
| Township / Ward | Ocean Md |
| Est. Birth Year | ~1923 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Lawrence Byrne | Son | — | 12 | ~1928 |
| Martha Byrne | Spouse | — | 45 | ~1895 |
| Margaret Byrne | Daughter | — | 16 | ~1924 |
| John Byrne | Son | — | 17 | ~1923 |
| John Byrne | Head | — | 45 | ~1895 |
| Paul Byrne | Son | — | 15 | ~1925 |
| Peter Byrne | Son | — | 5 | ~1935 |
| Miles Byrne | Son | — | 10 | ~1930 |
| William Byrne | Son | — | 8 | ~1932 |
Census Appearances
1930
Allegany, Maryland
Son, age 7
Allegany, Maryland · implied b. ~1923 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Byrne |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Allegany-County, Maryland
Son, age 17
Allegany-County, Maryland · implied b. ~1923 — 9 household members
| Surname | Byrne |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Ocean Md. |
| 1935 Residence (County) | Allegany |
| Occupation | New Worker |
| Industry | N.Y.A. |
| Class of Worker | GW |
| Hours Worked | 2 |
| Income (1939) | 36 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 17 · b. ~1923 · Maryland
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Sibling
Paul Byrne
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Byrne
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Byrne
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Miles Byrne
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Byrne
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Byrne
Sibling · 1940 · age 5
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 — Allegany-County, Maryland
Open full size
1940 US Federal Census — Allegany-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01500-00553)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas Plummer | 56 | Head | Coal Miner | Maryland |
| 2 | Marion Plummer | 46 | Wife | — | Maryland |
| 3 | Jean Plummer | 16 | Daughter | — | Maryland |
| 4 | Herbert Mcmullen | 3 | Nephew | — | Maryland |
| 5 | John J. Byrne | 45 | Head | Foreman | Maryland |
| 6 | Martha Byrne | 45 | Wife | — | Maryland |
| 7 | John Byrne THIS PERSON | 17 | Son | New Worker | Maryland |
| 8 | Margaret Byrne | 16 | Daughter | — | Maryland |
| 9 | Paul Byrne | 15 | Son | — | Maryland |
| 10 | Lawrence Byrne | 12 | Son | — | Maryland |
| 11 | Miles Byrne | 10 | Son | — | Maryland |
| 12 | William Byrne | 8 | Son | — | Maryland |
| 13 | Peter Donald Byrne | 5 | Son | — | Maryland |
| 14 | Arch Murdaugh | 53 | Head | R. Road Conductor | Maryland |
| 15 | Evelyne Murdaugh | 55 | Wife | — | Maryland |
| 16 | Charles Murdaugh | 18 | Son | N.Y.A. | Maryland |
| 17 | Catherine Lestic | 56 | Head | — | Austria |
| 18 | John J. Lestic | 25 | Son | Coal Miner | Maryland |
| 19 | Agnes Lestic | 27 | Daughter | Seamstress | Maryland |
| 20 | Rosalie Lestic | 10 | Nephew | — | Maryland |
| 21 | Peter Ashbush | 81 | Head | — | Eire |
| 22 | Martha Ashbush | 60 | Sister | — | Eire |
| 23 | Mary Ashbush | 57 | Sister | — | Eire |
| 24 | Francis Hughes | 23 | Grandson | Truck Driver | Maryland |
| 25 | Martha Hughes | 45 | Daughter | — | Maryland |
| 26 | Michael Hughes | 62 | Head | Coal Miner | Maryland |
| 27 | Eva May Hughes | 57 | Wife | — | Maryland |
| 28 | Margaret Hughes | 13 | Daughter | — | Maryland |
| 29 | Gibson Matthews | 36 | Head | Coal Miner | Maryland |
| 30 | Stella Matthews | 32 | Wife | — | Maryland |
| 31 | Junior Matthews | 15 | Son | New Worker | Maryland |
| 32 | Jean Matthews | 13 | Daughter | — | Maryland |
| 33 | La Verne Matthews | 10 | Daughter | — | Maryland |
| 34 | Dale Matthews | 8 | Son | — | Maryland |
| 35 | Joseph Malyer | 60 | Head | Coal Miner | Maryland |
| 36 | Mary Malyer | 47 | Wife | — | Maryland |
| 37 | John Malyer | 20 | Son | Ccc | Maryland |
| 38 | Thelma Malyer | 18 | Daughter | N.Y.A. | Maryland |
| 39 | Mary Malyer | 16 | Daughter | — | Maryland |
| 40 | Regina Malyer | 14 | Daughter | — | Maryland |
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)