WM
William Mcmahon — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Milwaukee, Wisconsin
Our Model Tree links this William Mcmahon across the 1930 and 1940 US Censuses in Milwaukee, Wisconsin (XGBoost, ~Confirmed) — first a head (b.~1867), then head of a 20-person household.
Age 63
b. ~1867
Male
Head
Born: Massachusetts
Widowed
1930 Census Record Details
| Census Year | 1930 |
| Location | Milwaukee, Wisconsin |
| Surname | McMahon |
| Given Name | William J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Occupation | Telegrapher |
| Industry | Brokerage |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 10000 |
| Radio Set | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Telegrapher |
| Township / Ward | Milwaukee Wis City |
| Est. Birth Year | ~1867 |
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.
20 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Robert Murphy | Other | — | 20 | ~1910 |
| Margaret Galligan | Daughter | — | 18 | ~1912 |
| Alice Galligan | Spouse | — | 50 | ~1880 |
| Bert Lemmens | Other | — | 34 | ~1896 |
| Francis Sullivan | Son | — | 18 | ~1912 |
| William Mcmahon | Son | — | 36 | ~1894 |
| Stephen Galligan | Son | — | 16 | ~1914 |
| Elsa Hotzuba | Daughter | — | 24 | ~1906 |
| Stephen Galligan | Other | — | 54 | ~1876 |
| John Galligan | Son | — | 23 | ~1907 |
| Miles Buran | Other | — | 20 | ~1910 |
| William Mcmahon | Head | — | 63 | ~1867 |
| Frances Mcmahon | Other | — | 36 | ~1894 |
| Harold Bahler | Other | — | 31 | ~1899 |
| Maym Sullivan | Other | — | 41 | ~1889 |
| Albert Schmidt | Other | — | 38 | ~1892 |
| Edward Hotzuba | Son | — | 19 | ~1911 |
| Margaret Buran | Other | — | 49 | ~1881 |
| Harry Shaver | Other | — | 55 | ~1875 |
| Walter Jacobs | Other | — | 29 | ~1901 |
Census Appearances
1930
Milwaukee, Wisconsin
Head, age 63
Milwaukee, Wisconsin · implied b. ~1867 — 20 household members
| Surname | McMahon |
| Given Name | William J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Telegrapher |
| Industry | Brokerage |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 10000 |
| Radio Set | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Milwaukee-County, Wisconsin
Other, age 73
Milwaukee-County, Wisconsin · implied b. ~1867 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | William J. |
| Relationship to Head | Father |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Widowed |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Milwaukee |
| 1935 Residence (County) | Milwaukee |
| Highest Grade | Hs 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 William Mcmahon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Mcmahon
Head · 1930 · age 63 · b. ~1867 · Wisconsin
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Milwaukee, Wisconsin
Open full size
1930 US Federal Census — Milwaukee, Wisconsin
Page Contents
45 people indexed on this census page (ia:1930:15thcensus2585unit:0903)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Augusta Heiser | 78 | Head | Washer Woman | Germany |
| 2 | Walter Heiser | 24 | Grand son | Laborer | Wisconsin |
| 3 | William J. Murphy | 44 | R | Physician | Wisconsin |
| 4 | Mary Murphy | 71 | Mother | — | Wisconsin |
| 5 | Jane Haley | 51 | Sister | — | Wisconsin |
| 6 | Ann D. Murphy | 49 | Brother | Clerk | Wisconsin |
| 7 | John L. Sullivan | 42 | R | Conductor | North Dakota |
| 8 | Kathleen Sullivan | 37 | Wife | — | Michigan |
| 9 | Margaret Sullivan | 15 | Daughter | — | Wisconsin |
| 10 | Cecelia Grenn | 18 | Lodger | — | Michigan |
| 11 | Ellen Scofield | 70 | R | — | Wisconsin |
| 12 | Mary Gloria Scofield | 24 | Daughter | Teacher | Wisconsin |
| 13 | Anna B. Doyle | 76 | R | — | Irish Free State |
| 14 | Carlton Bremer | 27 | Lodger | — | Wisconsin |
| 15 | Joseph Kassonia | 30 | Lodger | Engineer | Austria |
| 16 | Gus Diettert | 55 | R | Animator | Wisconsin |
| 17 | Bessie Diettert | 64 | Wife | — | Sweden |
| 18 | Edward H. Funk | 53 | R | Manager | Indiana |
| 19 | Maude Funk | 52 | Wife | — | Kentucky |
| 20 | Arthur Jasper | 40 | Lodger | Buyer | Minnesota |
| 21 | Chris Bakemeyer | 39 | R | Machinist | Indiana |
| 22 | Martha Bakemeyer | 31 | Wife | — | Wisconsin |
| 23 | Bernice Bakemeyer | 11 | Daughter | — | Wisconsin |
| 24 | Roland Bakemeyer | 1 | Son | — | Wisconsin |
| 25 | Fred Bakemeyer | 39 | Brother | Cabinet Maker | Indiana |
| 27 | William J. Mcmahon THIS PERSON | 63 | Head | Telegrapher | Massachusetts |
| 28 | William E. Mcmahon | 36 | Son | Postal Clerk | Wisconsin |
| 29 | Frances G. Mcmahon | 36 | Dau-in-law | Nurse | Wisconsin |
| 30 | Harry L. Shaver | 55 | Cousin | Dispatcher | Illinois |
| 31 | Margaret Buran | 49 | R | — | Wisconsin |
| 32 | Miles Buran | 20 | Step-son | Packer | Wisconsin |
| 33 | Elsa Hotzuba | 24 | Daughter | Packer | Wisconsin |
| 34 | Edward Hotzuba | 19 | Son | Laborer | Wisconsin |
| 35 | Bert Lemmens | 34 | Lodger | Iron Worker | Wisconsin |
| 36 | Walter Jacobs | 29 | Lodger | Moulder | Wisconsin |
| 37 | Harold Bahler | 31 | Lodger | Painter | Wisconsin |
| 38 | Maym Sullivan | 41 | R | Saleslady | Michigan |
| 39 | Francis Sullivan | 18 | Son | — | Minnesota |
| 40 | Albert Schmidt | 38 | Lodger | Sawyer | Wisconsin |
| 41 | Stephen A. Galligan | 54 | R | Timekeeper | Wisconsin |
| 42 | Alice Galligan | 50 | Wife | — | Illinois |
| 43 | John Galligan | 23 | Son | Order Clerk | Illinois |
| 44 | Margaret Galligan | 18 | Daughter | — | Wisconsin |
| 45 | Stephen Jr. Galligan | 16 | Son | — | Wisconsin |
| 46 | Robert Murphy | 20 | Lodger | Truck Driver | Wisconsin |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)