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James Mcgrath — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this James Mcgrath across the 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 13-person household.
Age 10
b. ~1920
Male
Son
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Virginia |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1920 |
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.
13 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcgrath | Daughter | — | 18 | ~1912 |
| Patrick Mcgrath | Head | — | 52 | ~1878 |
| Patrick Mcgrath | Son | — | 21 | ~1909 |
| Joseph Mcgrath | Son | — | 14 | ~1916 |
| John Mcgrath | Son | — | 16 | ~1914 |
| Baby Mcgrath | Son | — | ~1930 | |
| William Mcgrath | Son | — | 2 | ~1928 |
| Edward Mcgrath | Son | — | 4 | ~1926 |
| Francis Mcgrath | Son | — | 12 | ~1918 |
| Thomas Mcgrath | Son | — | 8 | ~1922 |
| Robert Mcgrath | Son | — | 6 | ~1924 |
| James Mcgrath | Son | — | 10 | ~1920 |
| Margaret Mcgrath | Spouse | — | 57 | ~1873 |
Census Appearances
1930
San Francisco, …
Son, age 10
San Francisco, California · implied b. ~1920 — 13 household members
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Virginia |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Other, age 21
San-Francisco-County, California · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Jack |
| Relationship to Head | lodger |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Monterey |
| Occupation | Department Store |
| Industry | PW |
| Class of Worker | 350 |
| Highest Grade | Hs 4 |
| 1935 Residence | 48 |
| 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 James Mcgrath across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Mcgrath
Son · 1930 · age 10 · b. ~1920 · California
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Sibling
Patrick Mcgrath
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Mcgrath
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcgrath
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Mcgrath
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mcgrath
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mcgrath
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Mcgrath
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Baby Mcgrath
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Mcgrath
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcgrath
Sibling · 1930 · age 18
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:californiacensus00reel208:0043)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James G Lunt | 57 | Head | Cook | Ohio |
| 2 | Jessie Lunt | 55 | Wife | Cook | Missouri |
| 3 | Jake Jacobs | 61 | Head | Barber | Nevada |
| 4 | Mary Jacobs | 57 | Wife | — | California |
| 5 | Gore Hallams | 32 | Lodger | Book-Keeper | France |
| 6 | Marie Anderson | 62 | Lodger | Domestic | Sweden |
| 7 | Daniel Mcrengue | 35 | Former | Driver | Texas |
| 8 | Alice Flor | 50 | Lodger | — | Missouri |
| 9 | Maurice Greenberg | 55 | Head | Proprietor | Russia |
| 10 | Fannie Greenberg | 51 | Wife | — | Rumania |
| 11 | Freda Greenberg | 25 | Daughter | Stenog | Connecticut |
| 12 | Marie Greenberg | 17 | Daughter | — | California |
| 13 | Lillian Greenberg | 15 | Daughter | — | California |
| 14 | Arthur H Greenberg | 12 | Son | — | Washington |
| 15 | Baby Greenberg | 2 | Son | — | Ohio |
| 16 | John R Orr | 69 | Head | Auditor | Iowa |
| 17 | Jennie H Orr | 70 | Wife | — | New York |
| 18 | John F Orr | 29 | Son | Clerk | Massachusetts |
| 19 | Alfred Lansberry | 35 | Head | Teacher | Massachusetts |
| 20 | Lillian Lansberry | 32 | Wife | — | New York |
| 21 | Patrick Mcgrath | 52 | Head | Foreman | Ireland |
| 22 | Margaret Mcgrath | 57 | Wife | Cook | Virginia |
| 23 | Patrick Mcgrath | 21 | Son | — | California |
| 24 | Margaret Mcgrath | 18 | Daughter | — | California |
| 25 | John Mcgrath | 16 | Son | — | California |
| 26 | Joseph Mcgrath | 14 | Son | — | California |
| 27 | Francis Mcgrath | 12 | Son | — | California |
| 28 | James Mcgrath THIS PERSON | 10 | Son | — | California |
| 29 | Thomas Mcgrath | 8 | Son | — | California |
| 30 | Robert Mcgrath | 6 | Son | — | California |
| 31 | Edward Mcgrath | 4 | Son | — | California |
| 32 | William Mcgrath | 2 | Son | — | California |
| 33 | Baby Mcgrath | 0 | Son | — | California |
| 34 | James G Lunt | 57 | Head | Cook | Ohio |
| 35 | Jessie Lunt | 55 | Wife | Cook | Missouri |
| 36 | Jake Jacobs | 61 | Head | Barber | Nevada |
| 37 | Mary Jacobs | 57 | Wife | — | California |
| 38 | Gore Hallams | 32 | Lodger | Book-Keeper | France |
| 39 | Marie Anderson | 62 | Lodger | Domestic | Sweden |
| 40 | Daniel Mcrengue | 35 | Former | Driver | Texas |
| 41 | Alice Flor | 50 | Lodger | — | Missouri |
| 42 | Maurice Greenberg | 55 | Head | Proprietor | Russia |
| 43 | Fannie Greenberg | 51 | Wife | — | Rumania |
| 44 | Freda Greenberg | 25 | Daughter | Stenog | Connecticut |
| 45 | Marie Greenberg | 17 | Daughter | — | California |
| 46 | Lillian Greenberg | 15 | Daughter | — | California |
| 47 | Arthur H Greenberg | 12 | Son | — | Washington |
| 48 | Baby Greenberg | 2 | Son | — | Ohio |
| 49 | John R Orr | 69 | Head | Auditor | Iowa |
| 50 | Jennie H Orr | 70 | Wife | — | New York |
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)