MF
Mary Finn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Mary Finn across the 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 8-person household.
Age 61
b. ~1879
Female
Head
Born: California
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Finn |
| Given Name | Mary A. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Widowed |
| Birthplace | California |
| 1935 Residence (City) | San Francisco city |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1879 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Marie Finn | Daughter | — | 38 | ~1902 |
| Gertrude Finn | Daughter | — | 26 | ~1914 |
| Mary Finn | Head | — | 61 | ~1879 |
| Rita Finn | Daughter | — | 20 | ~1920 |
| Edward Finn | Son | — | 36 | ~1904 |
| Richard Finn | Son | — | 22 | ~1918 |
| Dolores Finn | Daughter | — | 23 | ~1917 |
| Nellie Mcdermott | Other | — | 67 | ~1873 |
Census Appearances
1930
San Francisco, …
Spouse, age 51
San Francisco, California · implied b. ~1879 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finn |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 19 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Head, age 61
San-Francisco-County, California · implied b. ~1879 — 8 household members
| Surname | Finn |
| Given Name | Mary A. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Widowed |
| Birthplace | California |
| 1935 Residence (City) | San Francisco city |
| 1935 Residence (County) | San Francisco |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Finn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Finn
Head · 1940 · age 61 · b. ~1879 · California
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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
40 people indexed on this census page (nara:1940:m-t0627-00314-00300)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur E. Raine | 31 | Lodger | Attendant | California |
| 2 | Russell A. Goheen | 23 | Head | Business School Representative | California |
| 3 | Diana W. Goheen | 23 | Wife | — | California |
| 4 | John W. Welch | 50 | Head | Bartender | Arkansas |
| 5 | Helen Welch | 31 | Wife | — | Washington |
| 6 | Edward T. Herold | 35 | Head | Production Foreman | Minnesota |
| 7 | Julia E. Herold | 29 | Wife | — | California |
| 8 | Jeanette Miller | 59 | Head | — | California |
| 9 | Samuel W. Kaplan | 51 | Lodger | Laborer | Russia |
| 10 | Katherine M. Judy | 69 | Head | Clerk | California |
| 11 | Katherine Bauer | 64 | Head | — | Pennsylvania |
| 12 | John Dagit | 50 | Head | Proprietor | Germany |
| 13 | Emogene Hutchinson | 66 | Head | — | Maine |
| 14 | Nellie H. Brown | 70 | Sister | — | Maine |
| 15 | Clayton B. Wilson | 67 | Lodger | Office Worker | California |
| 16 | Carrie W. Davis | 55 | Lodger | Office Worker | California |
| 17 | Carrie R. Avery | 81 | Head | — | California |
| 18 | Augusta Straus | 77 | Head | — | California |
| 19 | Mary A. Finn THIS PERSON | 61 | Head | — | California |
| 20 | Marie A. Finn | 38 | Daughter | Office Worker | California |
| 21 | Edward A. Finn | 36 | Son | Clerk | California |
| 22 | Gertrude Finn | 26 | Daughter | Clerk | California |
| 23 | Dolores Finn | 23 | Daughter | Office Worker | California |
| 24 | Richard Finn | 22 | Son | Office Worker | California |
| 25 | Rita Finn | 20 | Daughter | Office Worker | California |
| 26 | Nellie Mcdermott | 67 | Sister | Office Worker | California |
| 27 | Robert M. Shaw | 56 | Head | Truck Helper | Maine |
| 28 | Martha M. Shaw | 53 | Wife | — | Canada-English |
| 29 | Mason Shaw | 19 | Son | Apprentice Cabinet Maker | Canada-English |
| 30 | Acheson B. Hartford | 56 | Brother-in-law | Apt. House Owner | Canada-English |
| 31 | Mary F. Yeager | 66 | Head | — | New York |
| 32 | Mary George | 42 | Head | Laundress | Portland |
| 33 | Ellen Mcdonald | 64 | Head | Machine Sewing | Canada-English |
| 34 | Ida S. Peterson | 61 | Head | Bookkeeper | Sweden |
| 35 | Emma Mclean | 77 | Head | — | Canada-English |
| 36 | Ruth E. Bean | 46 | Head | Clerk | California |
| 37 | George H. Wilkening | 61 | Head | Plasterer | California |
| 38 | Karolina Folchling | 70 | Head | — | Germany |
| 39 | Walter Lilygren | 57 | Head | Photographer | Minnesota |
| 40 | Veda Lilygren | 61 | Wife | — | Wisconsin |
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)