JC
John Clifford — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this John Clifford across the 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed) — first a son (b.~1916), then head of a 8-person household.
Age 24
b. ~1916
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Clifford |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | clerk |
| Industry | curtain manufacturing |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Clerk |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1916 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Clifford | Daughter | — | 27 | ~1913 |
| Josephine Clifford | Daughter | — | 26 | ~1914 |
| Catherine Clifford | Head | — | 55 | ~1885 |
| Mona Clifford | Daughter | — | 16 | ~1924 |
| John Clifford | Son | — | 24 | ~1916 |
| Catherine Clifford | Daughter | — | 22 | ~1918 |
| James Clifford | Son | — | 22 | ~1918 |
| Margaret Connor | Other | — | 80 | ~1860 |
Census Appearances
1930
San Francisco, …
Son, age 14
San Francisco, California · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clifford |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Son, age 24
San-Francisco-County, California · implied b. ~1916 — 8 household members
| Surname | Clifford |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | clerk |
| Industry | curtain manufacturing |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 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 John Clifford across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Clifford
Son · 1940 · age 24 · b. ~1916 · California
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Sibling
Josephine Clifford
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mona Clifford
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Clifford
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Clifford
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Clifford
Sibling · 1940 · age 22
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
1940 US Federal Census — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
34 people indexed on this census page (nara:1940:m-t0627-00310-00985)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clayton Hayes | 27 | Head | Teamster | California |
| 42 | Dorothy Hayes | 21 | Wife | None | California |
| 46 | Samuel Saporita | 28 | Head | Florist | California |
| 47 | Anne Saporita | 35 | Wife | None | Pennsylvania |
| 48 | Betty Saporita | 18 | Daughter | Telegrapher | Utah |
| 49 | Frank Tarleton | 42 | Head | Telephone Operator | California |
| 50 | Jessie Tarleton | 49 | Wife | Sheet Metal Worker | California |
| 51 | Sherwood Sylvia | 34 | Head | Housekeeper | New York |
| 52 | Tillie Sylvia | 22 | Wife | Teamster | California |
| 53 | William Sylvia | 2 | Son | — | California |
| 54 | Tony Guida | 36 | Head | Department Supervisor | California |
| 55 | Anna Guida | 29 | Wife | Laundress | California |
| 56 | A. J. Sylvia | 57 | Head | Clerk | Massachusetts |
| 59 | Mary Pierce | 65 | Head | — | California |
| 60 | Richard T. Pierce | 27 | Son | Sheet Metal Worker | California |
| 61 | William Pierce | 26 | Son | Carpenter | California |
| 62 | Karl Frey | 43 | Head | Cabinet Maker | Germany |
| 63 | Hulda Frey | 49 | Wife | — | Palestine |
| 64 | Enidda Frey | 21 | Daughter | Housework | Germany |
| 65 | Unetra Frey | 17 | Son | Laborer | Palestine |
| 66 | George Lertner | 61 | Head | Machinist | Germany |
| 67 | Rose Smith | 29 | Daughter | — | Germany |
| 68 | Clifton L. Smith | 38 | Son-in-law | Mechanic | New Hampshire |
| 69 | Clifton Smith | 2 | Son | — | California |
| 70 | Lucinda Moreau | 67 | Head | — | England |
| 72 | Catherine Clifford | 55 | Head | Janitress | Ireland |
| 73 | Margaret Clifford | 27 | Daughter | Housework | California |
| 74 | Josephine Clifford | 26 | Daughter | Maid | California |
| 75 | John Clifford THIS PERSON | 24 | Son | Clerk | California |
| 76 | James Clifford | 22 | Son | Janitor | California |
| 77 | Catherine Clifford | 22 | Daughter | — | California |
| 78 | Mona Clifford | 16 | Daughter | — | California |
| 79 | Margaret Connor | 80 | Lodger | — | New York |
| 80 | Edward J. Haley | 60 | Head | Motorman | New York |
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)