ML
Margaret Lynch — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this Margaret Lynch across the 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 28-person household.
Age 1
b. ~1929
Female
Daughter
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Lynch |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1929 |
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.
28 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Mary Lynch | Daughter | — | ~1930 | |
| Hannah Lynch | Daughter | — | 21 | ~1909 |
| Alice Lynch | Daughter | — | ~1930 | |
| Alice Lynch | Daughter | — | 6 | ~1924 |
| Margaret Lynch | Daughter | — | 1 | ~1929 |
| Elizabeth Lynch | Daughter | — | ~1930 | |
| Mary Lynch | Daughter | — | 8 | ~1922 |
| Catherine Lynch | Daughter | — | ~1930 | |
| Margaret Lynch | Daughter | — | ~1930 | |
| James Lynch | Head | — | 53 | ~1877 |
| John Lynch | Son | — | 18 | ~1912 |
| Edward Lynch | Son | — | 16 | ~1914 |
| William Lynch | Son | — | ~1930 | |
| Edward Lynch | Son | — | ~1930 | |
| Richard Lynch | Son | — | ~1930 | |
| James Lynch | Son | — | ~1930 | |
| Joseph Lynch | Son | — | 4 | ~1926 |
| Patrick Lynch | Son | — | ~1930 | |
| Richard Lynch | Son | — | 2 | ~1928 |
| Joseph Lynch | Son | — | ~1930 | |
| Thomas Lynch | Son | — | ~1930 | |
| William Lynch | Son | — | 14 | ~1916 |
| Robert Lynch | Son | — | ~1930 | |
| John Lynch | Son | — | ~1930 | |
| Thomas Lynch | Son | — | 10 | ~1920 |
| Robert Lynch | Son | — | 12 | ~1918 |
| James Lynch | Son | — | 23 | ~1907 |
| Elizabeth Lynch | Spouse | — | 52 | ~1878 |
Census Appearances
1930
San Francisco, …
Daughter, age 1
San Francisco, California · implied b. ~1929 — 28 household members
| Surname | Lynch |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Daughter, age 12
San-Francisco-County, California · implied b. ~1928 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | LYNCH |
| Given Name | MARCELLA |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Highest Grade | No 6 |
| 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 Margaret Lynch across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Margaret Lynch
Daughter · 1930 · age 1 · b. ~1929 · California
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Sibling
William Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Lynch
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Lynch
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Lynch
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Lynch
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Lynch
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Lynch
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Lynch
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hannah Lynch
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Lynch
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Lynch
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Lynch
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Lynch
Sibling · 1930 · age 8
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
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:californiacensus00reel194:0739)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Cutter | 47 | Head | Contractor | California |
| 2 | Mary Cutter | 47 | Wife | — | California |
| 3 | William Cutter | 24 | Son | Salesman | California |
| 4 | Mary Cutter | 21 | Daughter | Stenographer | California |
| 5 | James Lynch | 53 | Head | Laborer | California |
| 6 | Elizabeth Lynch | 52 | Wife | — | California |
| 7 | James Lynch | 23 | Son | Laborer | California |
| 8 | Hannah Lynch | 21 | Daughter | — | California |
| 9 | John Lynch | 18 | Son | — | California |
| 10 | Edward Lynch | 16 | Son | — | California |
| 11 | William Lynch | 14 | Son | — | California |
| 12 | Robert Lynch | 12 | Son | — | California |
| 13 | Thomas Lynch | 10 | Son | — | California |
| 14 | Mary Lynch | 8 | Daughter | — | California |
| 15 | Alice Lynch | 6 | Daughter | — | California |
| 16 | Joseph Lynch | 4 | Son | — | California |
| 17 | Richard Lynch | 2 | Son | — | California |
| 18 | Margaret Lynch THIS PERSON | 1 | Daughter | — | California |
| 19 | Catherine Lynch | 0 | Daughter | — | California |
| 20 | Patrick Lynch | 0 | Son | — | California |
| 21 | James Lynch | 0 | Son | — | California |
| 22 | Elizabeth Lynch | 0 | Daughter | — | California |
| 23 | John Lynch | 0 | Son | — | California |
| 24 | Edward Lynch | 0 | Son | — | California |
| 25 | William Lynch | 0 | Son | — | California |
| 26 | Robert Lynch | 0 | Son | — | California |
| 27 | Thomas Lynch | 0 | Son | — | California |
| 28 | Mary Lynch | 0 | Daughter | — | California |
| 29 | Alice Lynch | 0 | Daughter | — | California |
| 30 | Joseph Lynch | 0 | Son | — | California |
| 31 | Richard Lynch | 0 | Son | — | California |
| 32 | Margaret Lynch | 0 | Daughter | — | California |
| 33 | James Brown | 66 | Head | — | California |
| 34 | Ada Brown | 53 | Wife | — | California |
| 35 | William Lynch | 43 | Head | Laborer | California |
| 36 | Mary Lynch | 42 | Wife | — | California |
| 37 | James Lynch | 21 | Son | Laborer | California |
| 38 | Elizabeth Lynch | 19 | Daughter | — | California |
| 39 | James Lynch | 17 | Son | — | California |
| 40 | Hannah Lynch | 15 | Daughter | — | California |
| 41 | John Lynch | 13 | Son | — | California |
| 42 | Edward Lynch | 11 | Son | — | California |
| 43 | William Lynch | 9 | Son | — | California |
| 44 | Robert Lynch | 7 | Son | — | California |
| 45 | Thomas Lynch | 5 | Son | — | California |
| 46 | Mary Lynch | 3 | Daughter | — | California |
| 47 | Alice Lynch | 1 | Daughter | — | California |
| 48 | Joseph Lynch | 0 | Son | — | California |
| 49 | Richard Lynch | 0 | Son | — | California |
| 50 | Margaret Lynch | 0 | Daughter | — | California |
Related Census Records
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)