MK
Mary Kelly — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Mary Kelly across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents Timothy & John — first a daughter (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Kelly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | New Worker |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | New Worker |
| Township / Ward | San Francisco |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Kelly | Daughter | — | 22 | ~1918 |
| Mora Kelly | Head | — | 51 | ~1889 |
| John Kelly | Son | — | 21 | ~1919 |
| Timothy Kelly | Son | — | 24 | ~1916 |
| Timothy Kelly | Spouse | — | 52 | ~1888 |
Census Appearances
1920
San Francisco, …
Daughter, age 1
San Francisco, California · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kelly |
| Given Name | Mary H |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Daughter, age 11
San Francisco, California · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kelly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| Age at First Marriage | 11 |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Daughter, age 22
San-Francisco-County, California · implied b. ~1918 — 5 household members
| Surname | Kelly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | New Worker |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Mary Kelly across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Timothy Kelly (~0.92 confidence) and father John Kelly (~0.92 confidence) and mother Mora Kelly (~0.92 confidence) and mother Mary Kelly (~0.92 confidence) and mother Alfie Kelly (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Timothy Kelly
b. ~1888
Source father
● Household
· direct · ~0.92
Father
John Kelly
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Mora Kelly
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Mary Kelly
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Alfie Kelly
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Kelly
Daughter · 1940 · age 22 · b. ~1918 · California
★ You are viewing this record
Sibling
John Kelly
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Timothy Kelly
Sibling · 1940 · age 24
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 — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00307-00621)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Amy Bennett | 26 | Wife | — | California |
| 2 | David Jr Bennett | 6 | Son | — | California |
| 3 | John Brant | 79 | Head | — | Wisconsin |
| 4 | Caroline Brant | 68 | Wife | — | Wisconsin |
| 5 | Byron Brant | 32 | Son | Construction Foreman | Wisconsin |
| 6 | Emery (Al) Brant | 3 | Son | — | Wisconsin |
| 7 | Meta Boysen | 74 | Head | — | Germany |
| 8 | Mora N. Kelly | 51 | Head | — | Irish Free State |
| 9 | Timothy Kelly | 52 | Husband | — | Irish Free State |
| 10 | Timothy Jr Kelly | 24 | Son | Sheet Metal Apprentice | California |
| 11 | Mary Kelly THIS PERSON | 22 | Daughter | New Worker | California |
| 12 | John Kelly | 21 | Son | Truck Driver | California |
| 13 | George Myriopoulos | 50 | Head | Can Tester | Greece |
| 14 | Katherine Myriopoulos | 49 | Wife | — | Greece |
| 15 | Gus Myriopoulos | 23 | Son | Sandwich Man | California |
| 16 | Bessie Myriopoulos | 19 | Daughter | New Worker | California |
| 17 | Rita Holmes | 69 | Head | — | Missouri |
| 18 | Thomas Mccune | 53 | Son | — | Colorado |
| 19 | Fred Sciutti | 28 | Head | Window Cleaner | California |
| 20 | Louise Sciutti | 25 | Wife | — | France |
| 21 | Jeannie Sciutti | 2 | Daughter | — | California |
| 23 | James Farrell | 37 | Head | Bookkeeper | New York |
| 24 | Ray Hastings | 22 | Head | Shipping Clerk | California |
| 25 | Anne Hastings | 19 | Wife | Waitress | Italy |
| 26 | Carl Wade | 30 | Head | Shipfitter | Kansas |
| 27 | Louise Wade | 23 | Wife | — | Missouri |
| 28 | John Dawson | 22 | Head | Welder | Minnesota |
| 29 | Thelby Dawson | 20 | Wife | Food Handler | Colorado |
| 30 | Wesley Bowen | 33 | Head | Fabricator | Texas |
| 31 | Mable Bowen | 17 | Wife | — | Nebraska |
| 32 | Eric Sinkkonen | 37 | Head | Upholsterer Assembler | Finland |
| 33 | Lucille Sinkkonen | 32 | Wife | — | California |
| 34 | Eric Jr. Sinkkonen | 4 | Son | — | California |
| 35 | Louis Arkinstall | 37 | Head | Sales Clerk | California |
| 36 | Russell Bennett | 16 | Son | Newspaper Boy | California |
| 37 | Merrill Catto | 30 | Head | Longshoreman | New Mexico |
| 38 | Richard Machado | 23 | Head | Ship Scaler | Mexico |
| 39 | Aurelia Machado | 20 | Wife | — | Idaho |
| 40 | Joseph Machado | 0 | Son | 0 | California |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)