MN
Mary Nelson — 1920 US Census Record
Linked across censuses1920 United States Federal Census · San Francisco, California
Our Model Tree links this Mary Nelson across the 1900, 1910 and 1920 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a spouse (b.~1870), then head of a 6-person household.
Age 50
b. ~1870
Female
Spouse
Born: Ireland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | San Francisco, California |
| Surname | Nelson |
| Given Name | Mary L. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1885 |
| 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 | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1870 |
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 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Nelson | Head | — | 56 | ~1864 |
| Margaret Kavanagh | Other | — | 82 | ~1838 |
| Alfred Nelson | Son | — | 28 | ~1892 |
| Ernest Nelson | Son | — | 25 | ~1895 |
| George Nelson | Son | — | 20 | ~1900 |
| Mary Nelson | Spouse | — | 50 | ~1870 |
Census Appearances
1900
San Francisco, …
Spouse, age 33
San Francisco, California · implied b. ~1867 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Jan |
| Birth Year | 1867 |
| Year of Immigration | 1884 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
San Francisco, …
Spouse, age 42
San Francisco, California · implied b. ~1868 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 20 |
| Children Born | 3 |
| Children Living | 3 |
| Year of Immigration | 1885 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
San Francisco, …
Spouse, age 50
San Francisco, California · implied b. ~1870 — 6 household members
| Surname | Nelson |
| Given Name | Mary L. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1885 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| 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 Mary Nelson 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
Mary Nelson
Spouse · 1920 · age 50 · b. ~1870 · 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:1920:14thcensusofpopu135unit:0342)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Harry H. Tobill | 24 | boarder | Tailor | Ireland |
| 52 | O'Shea Michael Tobill | 23 | boarder | Cruiser | Ireland |
| 53 | Janvory Maurice Tobill | 45 | brother | Watchman | Ireland |
| 54 | Carl A. Roaberg | 50 | head | Driver | Sweden |
| 55 | Ellen A. Roaberg | 49 | wife | None | Ireland |
| 56 | John S. Roaberg | 20 | son | Butcher | California |
| 57 | Katherine A. Roaberg | 18 | daughter | Saleswoman | California |
| 58 | Joseph P. Roaberg | 16 | son | Billing-Clerk | California |
| 59 | John Mahoney | 34 | boarder | Manager | California |
| 60 | John T. Lane | 47 | head | Painter | California |
| 61 | Mary Lane | 42 | wife | None | California |
| 62 | Irene G. Lane | 22 | daughter | Stenographer | California |
| 63 | John E. Lane | 16 | son | None | California |
| 64 | Joseph V. Ducoing | 58 | head | Barber | California |
| 65 | Josephine Ducoing | 44 | wife | Packer | California |
| 66 | Agnes J. Ducoing | 16 | daughter | None | California |
| 67 | Elmer P. Ducoing | 8 | son | None | California |
| 68 | Elvira V. Ducoing | 6 | daughter | None | California |
| 69 | Clara M. Ducoing | 63 | sister | None | California |
| 70 | Patrick Keeley | 41 | head | Stationary Engineer | Ireland |
| 71 | Alice C. Keeley | 33 | wife | None | California |
| 72 | Otto C. Nelson | 45 | head | Tailor | Sweden |
| 73 | Matilda Nelson | 35 | wife | None | Sweden |
| 74 | Clifford A. Nelson | 11 | son | None | California |
| 75 | Stanley C. Nelson | 8 | son | None | California |
| 76 | Jacob Karlin | 50 | head | Bookkeeper | Kansas |
| 77 | Eugene F. Karlin | 18 | son | Filing Clerk | Kansas |
| 78 | Cyrilla A. Karlin | 16 | daughter | Wrapper | Kansas |
| 79 | Sibylla M. Karlin | 14 | daughter | None | Kansas |
| 80 | Irene M. Karlin | 13 | daughter | None | Illinois |
| 81 | Gertrude M. Karlin | 10 | daughter | None | Kansas |
| 82 | Lidra M. Karlin | 9 | daughter | None | Illinois |
| 83 | Helen M. Karlin | 4 | daughter | None | California |
| 84 | Peder O. Haughom | 34 | head | Painter | Norway |
| 85 | Helen E. Haughom | 36 | wife | None | New York |
| 86 | Merle S. Haughom | 5 | daughter | None | California |
| 87 | Helen E. Tabor | 6 | boarder | None | California |
| 88 | John M. Nelson | 56 | head | Carpenter | Sweden |
| 89 | Mary L. Nelson THIS PERSON | 50 | wife | None | Ireland |
| 90 | Alfred G. Nelson | 28 | son | Helper | California |
| 91 | Ernest J. Nelson | 25 | son | Clerk | California |
| 92 | George F. Nelson | 20 | son | Clerk | California |
| 93 | Margaret Kavanagh | 82 | mother-in-law | None | Ireland |
| 94 | Edmund Kuhn | 54 | head | Maltster | Prussia |
| 95 | Mary Kuhn | 47 | wife | None | California |
| 96 | Ethel C. Kuhn | 17 | daughter | Mail Clerk | California |
| 97 | Frederick Kuhn | 14 | son | None | California |
| 98 | John Wohn | 72 | father-in-law | None | Rhine-Bavaria |
| 99 | Katherine Wohn | 71 | mother-in-law | None | Rhine-Bavaria |
| 100 | Matt Ilaus | 41 | head | Cleaner | Trieste |
Related Census Records
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)