TM
Thomas Mcmahon — 1930 US Census Record
Model Tree available1930 United States Federal Census · Ramsey, Minnesota
Our Model Tree links this Thomas Mcmahon across the 1910, 1920 and 1930 US Censuses in Ramsey, Minnesota (XGBoost, ~Confirmed), with identified parents Frank & J — first a son (b.~1908), then head of a 6-person household.
Age 22
b. ~1908
Male
Son
Born: Minnesota
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Ramsey, Minnesota |
| Surname | McMahon |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Minnesota |
| Additional Details | |
| Occupation | Office Work |
| Industry | Wholesale Flour Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Office Work |
| Township / Ward | St Paul City |
| Est. Birth Year | ~1908 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Frank Mcmahon | Son | — | 33 | ~1897 |
| Agnes Mcmahon | Daughter | — | 26 | ~1904 |
| J Mcmahon | Head | — | 54 | ~1876 |
| Mary Mcmahon | Spouse | — | 54 | ~1876 |
| Genevieve Mcmahon | Daughter | — | 29 | ~1901 |
| Thomas Mcmahon | Son | — | 22 | ~1908 |
Census Appearances
1910
Ramsey, Minnesota
Son, age 2
Ramsey, Minnesota · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1920
Ramsey, Minnesota
Son, age 11
Ramsey, Minnesota · implied b. ~1909 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Ramsey, Minnesota
Son, age 22
Ramsey, Minnesota · implied b. ~1908 — 6 household members
| Surname | McMahon |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Minnesota |
| Occupation | Office Work |
| Industry | Wholesale Flour Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Thomas Mcmahon across 3 US Census years (1910, 1920 and 1930) in Ramsey, Minnesota, using XGBoost record linkage. Identified parents: father Frank Mcmahon (~0.92 confidence) and father J Mcmahon (~0.92 confidence) and mother Mary Mcmahon (~0.92 confidence) and mother Mary Mcmahon (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Mcmahon
b. ~1871
Source father
● Household
· direct · ~0.92
Father
J Mcmahon
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Mary Mcmahon
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Mary Mcmahon
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Mcmahon
Son · 1930 · age 22 · b. ~1908 · Minnesota
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Sibling
Genevieve Mcmahon
Sibling · 1930 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Mcmahon
Sibling · 1930 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Mcmahon
Sibling · 1930 · age 26
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
1930 US Federal Census — Ramsey, Minnesota
Open full size
1930 US Federal Census — Ramsey, Minnesota
Page Contents
50 people indexed on this census page (ia:1930:minnesotacensus00reel1122:0779)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bert Walworth | 54 | Head | Superintendent | Minnesota |
| 2 | Clara Walworth | 53 | Wife | — | Minnesota |
| 3 | Wesley Walworth | 18 | Son | — | Minnesota |
| 4 | Earl Craft | 29 | Head | Director Dept | Missouri |
| 5 | Margaret Craft | 21 | Wife | — | Minnesota |
| 6 | Lois Craft | 5 | Daughter | — | Minnesota |
| 7 | Cleone Craft | 2 | Daughter | — | Minnesota |
| 8 | Victor E. Hagberg | 36 | Head | Proprietor | Sweden |
| 9 | Judith Hagberg | 36 | Wife | — | Sweden |
| 10 | Viola Hagberg | 4 | Daughter | — | Minnesota |
| 11 | Hans Boysen | 45 | Head | Rate Clerk | Schleswig-Holstein Germany |
| 12 | Pauline Boysen | 42 | Wife | — | Russia |
| 13 | Adolph Boysen | 15 | Son | — | Canada English |
| 14 | John L. Berg | 47 | Head | Packer | Minnesota |
| 15 | Katherine Berg | 32 | Wife | — | Minnesota |
| 16 | William Strensky | 28 | Head | Salesman | Minnesota |
| 17 | Margaret Strensky | 24 | Wife | — | Minnesota |
| 18 | Lois Strensky | 5 | Daughter | — | Minnesota |
| 19 | Phyllis Strensky | 5 | Daughter | — | Minnesota |
| 20 | William Jr. Strensky | 4 | Son | — | Minnesota |
| 21 | J. Frank Mcmahon | 54 | Head | Salesman | Irish Free State |
| 22 | Mary Mcmahon | 54 | Wife | — | Minnesota |
| 23 | Frank Mcmahon | 33 | Son | Captain | Minnesota |
| 24 | Genevieve Mcmahon | 29 | Daughter | Billing Clerk | Minnesota |
| 25 | Agnes Mcmahon | 26 | Daughter | Clerk Cashier | Minnesota |
| 26 | Thomas Mcmahon THIS PERSON | 22 | Son | Office Work | Minnesota |
| 27 | Joseph J. Moravec | 45 | Head | Proprietor | Czechoslovakia |
| 28 | Katherine Moravec | 39 | Wife | — | Czechoslovakia |
| 29 | Joseph Moravec | 6 | Son | — | Wisconsin |
| 30 | Katherine Moravec | 5 | Daughter | — | Wisconsin |
| 31 | Paul A. Moravec | 2 | Son | — | Minnesota |
| 32 | Theodore Mieske | 36 | Head | Salesman | Wisconsin |
| 33 | Ruth Mieske | 30 | Wife | — | Minnesota |
| 34 | William Mieske | 9 | Son | — | Minnesota |
| 35 | Theodore Mieske | 7 | Son | — | Minnesota |
| 36 | Elma Schirmig | 43 | Head | — | Germany |
| 37 | Frances Schirmig | 24 | Daughter | Manager | Minnesota |
| 38 | Henrietta Schirmig | 17 | Daughter | — | Minnesota |
| 39 | George Kodode | 40 | Head | Welder | Minnesota |
| 40 | Anna Kodode | 45 | Wife | — | Pennsylvania |
| 41 | Anna Bergstedt | 38 | Head | Stenographer | Wisconsin |
| 42 | Clara Bergstedt | 66 | Mother | — | Sweden |
| 43 | Elma Harris | 35 | Sister | Stenographer | Wisconsin |
| 44 | Harvey Livermore | 34 | Head | Engineer | Wisconsin |
| 45 | Mary Livermore | 37 | Wife | — | Iowa |
| 46 | Joseph A. Costello | 44 | Head | Inspector | New York |
| 47 | Anna Costello | 32 | Wife | — | Illinois |
| 48 | Frantz Mary Costello | 73 | Mother-in-law | — | Czechoslovakia |
| 49 | Carl G. Halverson | 33 | Head | Editor | Iowa |
| 50 | Maybelle Halverson | 31 | Wife | — | South Dakota |
Pedigree Summary
Thomas + 3 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)