JL
John Leahy — 1920 US Census Record
Linked across censuses1920 United States Federal Census · San Francisco, California
Our Model Tree links this John Leahy across the 1900, 1910 and 1920 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a head (b.~1850), then head of a 4-person household.
Age 70
b. ~1850
Male
Head
Born: Ireland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | San Francisco, California |
| Surname | Leahy |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1878 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Year of Naturalization | 1883 |
| Birthplace (normalized) | ireland |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1850 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Nellie Leahy | Spouse | — | 57 | ~1863 |
| Grace Leahy | Daughter | — | 22 | ~1898 |
| Evelyn Leahy | Daughter | — | 15 | ~1905 |
| John Leahy | Head | — | 70 | ~1850 |
Census Appearances
1900
San Francisco, …
Head, age 50
San Francisco, California · implied b. ~1850 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leahy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Jun |
| Birth Year | 1850 |
| Year of Immigration | 1876 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Teamster |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
San Francisco, …
Head, age 60
San Francisco, California · implied b. ~1850 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leahy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 25 |
| Year of Immigration | 1868 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Salesman |
| Industry | Dry Goods Store |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
San Francisco, …
Head, age 70
San Francisco, California · implied b. ~1850 — 4 household members
| Surname | Leahy |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1878 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Year of Naturalization | 1883 |
| Birthplace (normalized) | ireland |
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 John Leahy across 3 US Census years (1900, 1910 and 1920) in San Francisco, California, using XGBoost record linkage.
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This person
Anchor record
John Leahy
Head · 1920 · age 70 · b. ~1850 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — San Francisco, California
Open full size
1920 US Federal Census — San Francisco, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu134unit:0463)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John F Leahy THIS PERSON | 70 | Head | None | Ireland |
| 2 | Nellie Leahy | 57 | Wife | None | Ireland |
| 3 | Grace Leahy | 22 | Daughter | None | California |
| 4 | Evelyn Leahy | 15 | Daughter | None | California |
| 5 | Nellie Loughlin | 42 | Head | Stenographer | California |
| 6 | Susan Curtis | 61 | Sister | Hair Dress | New York |
| 7 | Lunday Curtis | 72 | Boarder | None | California |
| 8 | Dennis Spallone | 38 | Head | Boilermaker | California |
| 9 | Margaret Spallone | 32 | Wife | None | California |
| 10 | Margaret Spallone | 10 | Daughter | None | California |
| 11 | Hansen Spallone | 5 | Son | None | California |
| 12 | Mary Spallone | 35 | Sister | None | California |
| 13 | John H Schoneman | 47 | Head | Carpenter | California |
| 14 | Emma Schoneman | 47 | Wife | None | California |
| 15 | Louis Stachmus | 52 | Head | Rigger | California |
| 16 | Lily Stachmus | 50 | Wife | None | Prussia |
| 17 | Lily Stachmus | 30 | Daughter | None | California |
| 18 | Albert Gaspardetti | 48 | Head | None | Italy |
| 19 | Lina Gaspardetti | 37 | Wife | None | Italy |
| 20 | Alice Gaspardetti | 7 | Daughter | None | California |
| 21 | George Mueller | 33 | Head | Carpenter | California |
| 22 | Olivia Mueller | 31 | Wife | None | California |
| 23 | Hans Lauhoff | 51 | Head | None | Russia |
| 24 | Alexander Lauhoff | 17 | Son | Clerk | California |
| 25 | Henrietta Lauhoff | 14 | Daughter | None | California |
| 26 | William A Hayes | 49 | Head | Carpenter | New York |
| 27 | Mary P Hayes | 39 | Wife | None | Ireland |
| 28 | Francis J Hayes | 17 | Son | Filler | California |
| 29 | Virginia M Hayes | 16 | Daughter | None | California |
| 30 | William J Hayes | 12 | Son | None | California |
| 31 | Gertrude M Hayes | 10 | Daughter | None | California |
| 32 | John Hayes | 8 | Son | None | California |
| 33 | Everett Davis | 26 | Head | None | California |
| 34 | William Canton | 22 | Brother in law | Porter | California |
| 35 | George W Thornton | 63 | Head | Painter | Nevada |
| 36 | Nels Mallow | 45 | Partner | Sailor | Sweden |
| 37 | Michael Barrett | 45 | Head | Longshoreman | Ireland |
| 38 | Ellen Barrett | 45 | Wife | None | Ireland |
| 39 | Daniel Barrett | 7 | Son | None | Rhode Island |
| 40 | Francis Barrett | 4 | Son | None | Rhode Island |
| 41 | Mary Barrett | 2 | Daughter | None | California |
| 42 | Henry Pfeff | 50 | Head | Plumber | California |
| 43 | Ida Pfeff | 50 | Wife | None | California |
| 44 | Herman P Tratz | 30 | Head | Teamster | California |
| 45 | Paula M Tratz | 24 | Wife | None | California |
| 46 | Dorothy M Tratz | 0 | Daughter | None | California |
| 47 | George P Mcdermott | 38 | Head | Carpenter | Ireland |
| 48 | Annie Mcdermott | 39 | Wife | None | Ireland |
| 49 | John Mcdermott | 7 | Son | None | California |
| 50 | Marie Mcdermott | 5 | Daughter | None | California |
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)