TM
Thomas Mcmahon — 1920 US Census Record
Model Tree available1920 United States Federal Census · Sullivan, New Hampshire
Our Model Tree links this Thomas Mcmahon across the 1900, 1910 and 1920 US Censuses in Sullivan, New Hampshire (XGBoost, ~Confirmed), with identified parents Leo & Thomas — first a son (b.~1895), then head of a 4-person household.
Age 25
b. ~1895
Male
Son
Born: New Hampshire
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Sullivan, New Hampshire |
| Surname | McMahon |
| Given Name | Thomas D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | New Hampshire |
| Additional Details | |
| Occupation | Laborer |
| Industry | Highway |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Occupation | Laborer |
| Township / Ward | Charlestown |
| Est. Birth Year | ~1895 |
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.
4 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Lucie Mcmahon | Spouse | — | 51 | ~1869 |
| Thomas Mcmahon | Head | — | 59 | ~1861 |
| Sidney Mcmahon | Son | — | 16 | ~1904 |
| Thomas Mcmahon | Son | — | 25 | ~1895 |
Census Appearances
1900
Sullivan, New …
Son, age 6
Sullivan, New Hampshire · implied b. ~1894 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Thomas P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Birth Month | Aug |
| Birth Year | 1894 |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | New Hampshire |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1910
Sullivan, New …
Son, age 15
Sullivan, New Hampshire · implied b. ~1895 — 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 | 15 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | New Hampshire |
| Occupation | Laborer |
| Industry | Odd Jobs |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1920
Sullivan, New …
Son, age 25
Sullivan, New Hampshire · implied b. ~1895 — 4 household members
| Surname | McMahon |
| Given Name | Thomas D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | New Hampshire |
| Occupation | Laborer |
| Industry | Highway |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 (1900, 1910 and 1920) in Sullivan, New Hampshire, using XGBoost record linkage. Identified parents: father Leo Mcmahon (~0.92 confidence) and father Thomas Mcmahon (~0.92 confidence) and father Thomas Mcmahon (~0.92 confidence) and mother Lucie Mcmahon (~0.92 confidence) and mother Lucy Mcmahon (~0.92 confidence) and mother Mary Mcmahon (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Leo Mcmahon
b. ~1863
Source father
● Household
· direct · ~0.92
Father
Thomas Mcmahon
b. ~1860
Source father
● Household
· direct · ~0.92
Father
Thomas Mcmahon
b. ~1861
Source father
● Household
· direct · ~0.92
Mother
Lucie Mcmahon
b. ~1869
Source mother
● Household
· direct · ~0.92
Mother
Lucy Mcmahon
b. ~1868
Source mother
● Household
· direct · ~0.92
Mother
Mary Mcmahon
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Mcmahon
Son · 1920 · age 25 · b. ~1895 · New Hampshire
★ You are viewing this record
Sibling
Sidney Mcmahon
Sibling · 1920 · age 16
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
1920 US Federal Census — Sullivan, New Hampshire
Open full size
1920 US Federal Census — Sullivan, New Hampshire
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1012unit:0116)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Alice M Whitmore | 42 | Wife | — | New Hampshire |
| 52 | George E Frellows | 38 | Head | Farmer | New Hampshire |
| 53 | Emma L Frellows | 43 | Wife | — | Connecticut |
| 54 | Newton F Addams | 42 | Head | Farmer | New York |
| 55 | Alice B Addams | 42 | Wife | — | New Hampshire |
| 56 | Gladys L Addams | 15 | Daughter | — | New Hampshire |
| 57 | Priscilla Addams | 2 | Daughter | — | New Hampshire |
| 58 | James B Addams | 0 | Son | — | New Hampshire |
| 59 | John S Sargent | 59 | Hired man | Laborer | Massachusetts |
| 60 | John E Foss | 31 | Head | Farmer | Maine |
| 61 | Gertie M Foss | 31 | Wife | — | New Hampshire |
| 62 | Blanche E Foss | 3 | Daughter | — | New Hampshire |
| 63 | John L Foss | 1 | Son | — | New Hampshire |
| 64 | Ruth L Foss | 0 | Daughter | — | New Hampshire |
| 65 | Jay N Call | 35 | Brother-in-law | Laborer | New Hampshire |
| 66 | Thomas J Mcmahon | 59 | Head | State Agent | New Hampshire |
| 67 | Lucie N Mcmahon | 51 | Wife | — | New Hampshire |
| 68 | Thomas D Mcmahon THIS PERSON | 25 | Son | Laborer | New Hampshire |
| 69 | Sidney W Mcmahon | 16 | Son | Machinist | New Hampshire |
| 70 | Joseph J Dorey | 74 | Head | — | New York |
| 71 | Donna Dorey | 69 | Wife | — | New York |
| 72 | Wesley A Hunt | 67 | Head | — | New Hampshire |
| 73 | Rose J Hunt | 67 | Wife | — | New Hampshire |
| 74 | Daniel A Vadney | 56 | Head | Laborer | New Hampshire |
| 75 | Ellen O Vadney | 56 | Wife | — | Maine |
| 76 | John R Fowle | 71 | Head | — | Vermont |
| 77 | Elizabeth H Barrett | 65 | Housekeeper | Housekeeper | Vermont |
| 78 | Moses S Tallman | 47 | Head | Farmer | Vermont |
| 79 | Caroline M Tallman | 45 | Wife | — | Vermont |
| 80 | Lula S Tallman | 18 | Son | — | Vermont |
| 81 | John B Reardon | 59 | Head | Clergyman | New York |
| 82 | Tratia M Reardon | 45 | Wife | — | Vermont |
| 83 | Gordon S Reardon | 17 | Son | — | Vermont |
| 84 | Augusta Morgan | 75 | Mother-in-law | — | Vermont |
| 85 | Frank Elie | 76 | Head | Blacksmith | Canada |
| 86 | Charlie A Elie | 27 | Grandson | Laborer | New Hampshire |
| 87 | Herbert H Dickerson | 48 | Head | Merchant | Massachusetts |
| 88 | Katherine M Dickerson | 50 | Wife | — | Massachusetts |
| 89 | Ida M Lloyd | 50 | Head | — | Vermont |
| 90 | Ruth M Lloyd | 14 | Daughter | — | New Hampshire |
| 91 | Frances Lloyd | 13 | Daughter | — | New Hampshire |
| 92 | Frances A Miller | 87 | Aunt | — | New Hampshire |
| 93 | Frank Shields | 50 | Lodger | Laborer | Massachusetts |
| 94 | George W Boutin | 74 | Head | — | Vermont |
| 95 | Georgiana Boutin | 64 | Wife | — | Vermont |
| 96 | Winfield M Lawrence | 58 | Head | Trader | New Hampshire |
| 97 | Maggie S Lawrence | 54 | Wife | — | New Hampshire |
| 98 | Leon P Herrick | 51 | Lodger | — | Maine |
| 99 | George L Farrow | 58 | Head | Farmer | Maine |
| 100 | Emma Farrow | 54 | Wife | — | Canada |
Pedigree Summary
Thomas + 1 sibling
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)