WM
William Mcmahon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Yancey-County, North Carolina
Our Model Tree links this William Mcmahon across the 1930 and 1940 US Censuses in Yancey-County, North Carolina (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 7-person household.
Age 22
b. ~1918
Male
Son
Born: North Carolina
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Yancey-County, North Carolina |
| Surname | McMahon |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | North Carolina |
| 1935 Residence (City) | South Toe |
| 1935 Residence (County) | Yancey |
| Additional Details | |
| Occupation | Cutter |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same Place |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
| Occupation | Cutter |
| Township / Ward | South Toe |
| Est. Birth Year | ~1918 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| William Mcmahon | Son | — | 22 | ~1918 |
| Devva Mcmahon | Spouse | — | 50 | ~1890 |
| Sue Mcmahon | Daughter | — | 19 | ~1921 |
| Mary Mcmahon | Daughter | — | 21 | ~1919 |
| Carl Mcmahon | Son | — | 17 | ~1923 |
| J Mcmahon | Head | — | 62 | ~1878 |
| Lizzie Mcmahon | Daughter | — | 30 | ~1910 |
Census Appearances
1930
Yancey, North …
Son, age 13
Yancey, North Carolina · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahan |
| Given Name | William E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | North Carolina |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | North Carolina |
| Can Read/Write | Yes |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
1940
Yancey-County, North …
Son, age 22
Yancey-County, North Carolina · implied b. ~1918 — 7 household members
| Surname | McMahon |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | North Carolina |
| 1935 Residence (City) | South Toe |
| 1935 Residence (County) | Yancey |
| Occupation | Cutter |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same Place |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
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 William Mcmahon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mcmahon
Son · 1940 · age 22 · b. ~1918 · North Carolina
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Sibling
Mary Mcmahon
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lizzie Mcmahon
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sue Mcmahon
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carl Mcmahon
Sibling · 1940 · age 17
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 — Yancey-County, North Carolina
Open full size
1940 US Federal Census — Yancey-County, North Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02991-01040)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Ballue | 77 | Mother | — | North Carolina |
| 42 | Martha D. Ball | 40 | Head | — | North Carolina |
| 43 | Joe Ball | 12 | Son | — | North Carolina |
| 44 | Dayton Ball | 10 | Son | Mining | North Carolina |
| 45 | Jim Ball | 3 | Son | — | North Carolina |
| 46 | Mrs Ella Branch | 60 | Head | — | North Carolina |
| 47 | Dark Hollifield | 29 | Son | Farm | North Carolina |
| 48 | Belle Hollifield | 23 | Daughter | — | North Carolina |
| 49 | Ella Hollifield | 5 | Daughter | — | North Carolina |
| 50 | Junior Hollifield | 4 | Son | — | North Carolina |
| 51 | Shirley Hollifield | 2 | Daughter | — | North Carolina |
| 52 | Virginia Hollifield | 0 | Daughter | — | North Carolina |
| 53 | Robert Wilson | 42 | Head | Farm | North Carolina |
| 54 | Sallie Wilson | 33 | Wife | — | North Carolina |
| 55 | Lillie Wilson | 14 | Daughter | — | North Carolina |
| 56 | Ray Wilson | 12 | Son | — | North Carolina |
| 57 | Marion Wilson | 9 | Daughter | — | North Carolina |
| 58 | W. B. Chrisawn | 59 | Head | Farm | North Carolina |
| 59 | Rosa Chrisawn | 59 | Wife | — | North Carolina |
| 60 | Dixie Chrisawn | 21 | Daughter | Waitress | North Carolina |
| 61 | J. W. Mcmahon | 62 | Head | Mining | North Carolina |
| 62 | Devva Mcmahon | 50 | Wife | — | North Carolina |
| 63 | Lizzie Mcmahon | 30 | Daughter | — | North Carolina |
| 64 | William Mcmahon THIS PERSON | 22 | Son | Cutter | North Carolina |
| 65 | Mary Mcmahon | 21 | Daughter | — | North Carolina |
| 66 | Sue Mcmahon | 19 | Daughter | — | North Carolina |
| 67 | Carl Mcmahon | 17 | Son | Farm | North Carolina |
| 68 | Dave Bluins | 32 | Head | Farm | North Carolina |
| 69 | Minnie Bluins | 32 | Wife | — | North Carolina |
| 70 | Edward Bluins | 11 | Son | — | North Carolina |
| 71 | Thelma Bluins | 8 | Daughter | — | North Carolina |
| 72 | Melvin Bluins | 6 | Son | — | North Carolina |
| 73 | Carrie Bluins | 5 | Daughter | — | North Carolina |
| 74 | Lois Bluins | 3 | Daughter | — | North Carolina |
| 75 | Waites Bluins | 41 | Brother | Farm | North Carolina |
| 76 | Lilia Bluins | 58 | Mother | — | North Carolina |
| 77 | Joe Bolick | 51 | Head | Mining | North Carolina |
| 78 | Alice Bolick | 42 | Wife | — | North Carolina |
| 79 | Louise Bolick | 18 | Daughter | — | North Carolina |
| 80 | Mae Bolick | 16 | Daughter | — | North Carolina |
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)