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James Mcmahon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Brooke-County, West Virginia
Our Model Tree links this James Mcmahon across the 1920, 1930 and 1940 US Censuses in Brooke-County, West Virginia (XGBoost, ~Confirmed) — first a head (b.~1875), then head of a 7-person household.
Age 65
b. ~1875
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Brooke-County, West Virginia |
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Wellsburg |
| 1935 Residence (County) | Brooke |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Sub Sta Operator |
| Industry | Coal Mine |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 725 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Sub Sta Operator |
| Township / Ward | Wellsburg |
| Est. Birth Year | ~1875 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Inez Mcmahon | Daughter | — | 30 | ~1910 |
| Mae Mcmahon | Daughter | — | 23 | ~1917 |
| Betty Mcmahon | Daughter | — | 18 | ~1922 |
| James Mcmahon | Head | — | 65 | ~1875 |
| Paul Mcmahon | Son | — | 16 | ~1924 |
| Harry Mcmahon | Son | — | 27 | ~1913 |
| Emma Mcmahon | Spouse | — | 56 | ~1884 |
Census Appearances
1920
Brooke, West …
Head, age 45
Brooke, West Virginia · implied b. ~1875 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1885 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Miner |
| Industry | Coal |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Scotland |
| Year of Naturalization | 1897 |
| Birthplace (normalized) | scotland |
1930
Brooke, West …
Head, age 52
Brooke, West Virginia · implied b. ~1878 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1884 |
| Age at First Marriage | 29 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | coal miner |
| Industry | coal mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 1800 |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Brooke-County, West …
Head, age 65
Brooke-County, West Virginia · implied b. ~1875 — 7 household members
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Wellsburg |
| 1935 Residence (County) | Brooke |
| Naturalization Status | Naturalized |
| Occupation | Sub Sta Operator |
| Industry | Coal Mine |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 725 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 James Mcmahon across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
James Mcmahon
Head · 1940 · age 65 · b. ~1875 · West Virginia
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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 — Brooke-County, West Virginia
Open full size
1940 US Federal Census — Brooke-County, West Virginia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04396-00684)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Helen Hannans | 42 | Sister-in-law | Sorter | W. Va |
| 42 | William Glover | 55 | Head | Laborer | Scotland |
| 43 | Richmond Glover | 21 | Son | Laborer | Scotland |
| 44 | Albert Fitzpatrick | 47 | Head | Shearman | England |
| 45 | Lottie Fitzpatrick | 47 | Wife | — | England |
| 46 | Walter Fitzpatrick | 24 | Son | Shearman | England |
| 47 | Albert Jr. Fitzpatrick | 22 | Son | Helper | England |
| 48 | Millicent Fitzpatrick | 18 | Daughter | Office Worker | Oklahoma |
| 49 | Walter Fitzpatrick | 51 | Head | Shearman | England |
| 50 | Elizabeth Fitzpatrick | 50 | Wife | — | England |
| 51 | Dolores Fitzpatrick | 9 | Daughter | — | W. Va |
| 52 | Elsie Fitzpatrick | 28 | Daughter | — | England |
| 53 | Abner Mcpherson | 62 | Head | Lineman | Kentucky |
| 54 | Ella Mcpherson | 61 | Wife | — | Penn |
| 55 | Irene Watson | 16 | Neice | — | Penn |
| 56 | John Stinoski | 56 | Head | — | Poland |
| 57 | John Jr. Stinoski | 23 | Son | Glass Worker | Penn |
| 58 | John Yanulivich | 61 | Boarder | Miner | Lithuania |
| 59 | Lester Wilson | 44 | Head | Finisher | W. Va |
| 60 | Bessie Wilson | 47 | Wife | Dressmaker | Penn |
| 61 | John Hoover | 23 | Head | Sheet Metal Worker | Ohio |
| 62 | Nora Hoover | 25 | Wife | — | W. Va |
| 63 | Bettyann Hoover | 2 | Daughter | — | W. Va |
| 64 | William Beel | 56 | Head | Water Tender | W. Va |
| 65 | Laura Beel | 54 | Wife | — | W. Va |
| 66 | James Mcmahon THIS PERSON | 65 | Head | Sub Sta Operator | Scotland |
| 67 | Emma Mcmahon | 56 | Wife | — | Ohio |
| 68 | Inez Mcmahon | 30 | Daughter | Sorter | Ohio |
| 69 | Harry Mcmahon | 27 | Son | Comp. Clerk | Ohio |
| 70 | Mae Mcmahon | 23 | Daughter | Clerk | Ohio |
| 71 | Betty Mcmahon | 18 | Daughter | — | W. Va |
| 72 | Paul Mcmahon | 16 | Son | — | W. Va |
| 73 | Dora Sandborn | 56 | Head | Cracking Off | W. Va |
| 74 | Basilio Gumbill | 53 | Head | Truck Foreman | Italy |
| 75 | Ruth Gumbill | 54 | Wife | — | Penn |
| 76 | Jackson Cook | 41 | Head | Salesman | W. Va |
| 77 | Josephine Cook | 43 | Wife | — | Penn |
| 78 | Jackson Jr. Cook | 15 | Son | — | W. Va |
| 79 | Henrietta Cook | 14 | Daughter | — | W. Va |
| 80 | Betty Lou Cook | 9 | Daughter | — | W. Va |
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)