MP
Mary Power — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this Mary Power across the 1920 and 1930 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a spouse (b.~1859), then head of a 9-person household.
Age 71
b. ~1859
Female
Spouse
Born: Ireland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Power |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Ireland |
| Age at First Marriage | 17 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1859 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Paul Power | Son | — | 35 | ~1895 |
| Mary Power | Spouse | — | 71 | ~1859 |
| James Power | Other | — | 11 | ~1919 |
| James Power | Son | — | 38 | ~1892 |
| Josephine Power | Daughter | — | 45 | ~1885 |
| Josephine Power | Other | — | 14 | ~1916 |
| Eva Power | Daughter | — | 30 | ~1900 |
| Elizabeth Power | Daughter | — | 42 | ~1888 |
| James Power | Head | — | 76 | ~1854 |
Census Appearances
1920
San Francisco, …
Spouse, age 57
San Francisco, California · implied b. ~1863 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Power |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1881 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1890 |
| Birthplace (normalized) | ireland |
1930
San Francisco, …
Spouse, age 71
San Francisco, California · implied b. ~1859 — 9 household members
| Surname | Power |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 71 |
| Marital Status | Married |
| Birthplace | Ireland |
| Age at First Marriage | 17 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| 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 Power across 2 US Census years (1920 and 1930) in San Francisco, California, using XGBoost record linkage.
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This person
Anchor record
Mary Power
Spouse · 1930 · age 71 · b. ~1859 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — San Francisco, California
Open full size
1930 US Federal Census — San Francisco, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel203:0660)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Herman Krieger | 42 | Head | Dealer | California |
| 2 | Alice Krieger | 40 | Wife | — | New York |
| 3 | Alice Krieger | 19 | Daughter | — | California |
| 4 | Herman Krieger | 18 | Son | — | California |
| 5 | Maude Krieger | 15 | Daughter | Maid | Canada |
| 6 | Robert J Muir | 55 | Head | Contracting | California |
| 7 | Lulu Muir | 55 | Wife | — | California |
| 8 | Thomas Martin | 54 | R | — | Ireland |
| 9 | Mary Martin | 54 | Wife | — | Ireland |
| 10 | Mary Martin | 24 | Daughter | Stenographer | California |
| 11 | Thomas Martin | 22 | Son | — | California |
| 12 | John Duffy | 48 | Head | — | California |
| 13 | Agnes Duffy | 46 | Sister | Manager | California |
| 14 | James Moore | 70 | Head | Contractor | Ireland |
| 15 | Martha Moore | 65 | Wife | — | Ireland |
| 16 | Martha Moore | 35 | Daughter | — | California |
| 17 | Eva Moore | 33 | Daughter | — | California |
| 18 | James Moore | 31 | Son | — | California |
| 19 | Rita Moore | 24 | Daughter | — | California |
| 20 | John Stack | 56 | Head | Dealer | Ireland |
| 21 | Mary Stack | 48 | Wife | — | Ireland |
| 22 | Mary Stack | 23 | Daughter | Clerk | California |
| 23 | John Stack | 21 | Son | — | California |
| 24 | Joseph Stack | 19 | Son | — | California |
| 25 | James Stack | 17 | Son | — | California |
| 26 | Gerald Stack | 15 | Son | — | California |
| 27 | Isabelle Stack | 13 | Daughter | — | California |
| 28 | Charles Stack | 11 | Son | — | California |
| 29 | Thomas Stack | 9 | Son | — | California |
| 30 | James Power | 76 | Head | — | Ireland |
| 31 | Mary Power THIS PERSON | 71 | Wife | — | Ireland |
| 32 | Josephine Power | 45 | Daughter | — | California |
| 33 | Elizabeth Power | 42 | Daughter | — | California |
| 34 | James Power | 38 | Son | Engineer | California |
| 35 | Paul Power | 35 | Son | Officer | California |
| 36 | Eva Power | 30 | Daughter | — | California |
| 37 | Josephine Power | 14 | Granddaughter | — | California |
| 38 | James Power | 11 | Grandson | — | California |
| 39 | Frank Jacobs | 47 | Head | — | New York |
| 40 | Sarah Jacobs | 45 | Wife | — | Japan |
| 41 | Ruth Jacobs | 21 | Daughter | — | California |
| 42 | Frank Jacobs | 19 | Son | — | California |
| 43 | Harry Beales | 52 | Head | Manager | North Carolina |
| 44 | Mary Beales | 48 | Wife | — | California |
| 45 | Harry Beales | 19 | Son | — | California |
| 46 | James Mickelson | 56 | Head | Captain | Norway |
| 47 | Mary Mickelson | 52 | Wife | — | Massachusetts |
| 48 | James Mickelson | 24 | Son | Engineer | Washington |
| 49 | Dorothy Mickelson | 22 | Daughter | Secretary | Washington |
| 50 | Alice Mickelson | 15 | Daughter | — | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)