JD
John Dunn — 1930 US Census Record
Model Tree available1930 United States Federal Census · San Francisco, California
Our Model Tree links this John Dunn across the 1910, 1920 and 1930 US Censuses in San Francisco, California (XGBoost, ~Confirmed), with identified parents Joseph & James — first a son (b.~1911), then head of a 5-person household.
Age 19
b. ~1911
Male
Son
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Dunn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| 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 City |
| Est. Birth Year | ~1911 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Alice Dunn | Daughter | — | 17 | ~1913 |
| James Dunn | Head | — | 45 | ~1885 |
| James Dunn | Son | — | 21 | ~1909 |
| John Dunn | Son | — | 19 | ~1911 |
| Mary Dunn | Spouse | — | 45 | ~1885 |
Census Appearances
1910
San Francisco, …
Son, age 1
San Francisco, California · implied b. ~1909 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
San Francisco, …
Son, age 10
San Francisco, California · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 19
San Francisco, California · implied b. ~1911 — 5 household members
| Surname | Dunn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| 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 |
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 Dunn across 3 US Census years (1910, 1920 and 1930) in San Francisco, California, using XGBoost record linkage. Identified parents: father Joseph Dunn (~0.92 confidence) and father James Dunn (~0.92 confidence) and father James Dunn (~0.92 confidence) and mother Mary Dunn (~0.92 confidence) and mother Mary Dunn (~0.92 confidence) and mother Irene Dunn (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Dunn
b. ~1877
Source father
● Household
· direct · ~0.92
Father
James Dunn
b. ~1885
Source father
● Household
· direct · ~0.92
Father
James Dunn
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Mary Dunn
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Mary Dunn
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Irene Dunn
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Dunn
Son · 1930 · age 19 · b. ~1911 · California
★ You are viewing this record
Sibling
James Dunn
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Dunn
Sibling · 1930 · age 17
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
49 people indexed on this census page (ia:1930:californiacensus00reel197:0943)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 52 | John H. | 33 | Head | — | Iowa |
| 53 | Lucy D. | 21 | Wife | — | Nebraska |
| 54 | Lloyd D. | 0 | Son | — | California |
| 55 | Tom Reagan | 37 | Head | — | Missouri |
| 56 | Eva M. Reagan | 37 | Wife | — | Missouri |
| 57 | Forrest Miller | 32 | Head | — | Missouri |
| 58 | Mabel Miller | 32 | Wife | — | Missouri |
| 59 | Virginia Miller | 11 | Daughter | — | Missouri |
| 60 | Kathryn Miller | 9 | Daughter | — | Missouri |
| 61 | George Miller | 4 | Son | — | Missouri |
| 62 | Eva Nicolini | 53 | Head | Proprietor | California |
| 63 | Fred Nicolini | 30 | Son | — | California |
| 64 | Edith Nicolini | 23 | Daughter | — | California |
| 65 | Erma Nicolini | 21 | Daughter | — | California |
| 66 | George Nicolini | 18 | Son | — | California |
| 67 | Theodora Nicolini | 13 | Daughter | — | California |
| 68 | James Dunn | 45 | Head | — | California |
| 69 | Mary Dunn | 45 | Wife | — | California |
| 70 | James Dunn | 21 | Son | — | California |
| 71 | John Dunn THIS PERSON | 19 | Son | — | California |
| 72 | Alice Dunn | 17 | Daughter | — | California |
| 73 | John Lynch | 45 | Head | — | Ireland |
| 74 | Catherine Lynch | 35 | Wife | — | California |
| 75 | John Lynch | 2 | Son | — | California |
| 76 | Catherine Lynch | 1 | Daughter | — | California |
| 77 | Mary Lynch | 0 | Daughter | — | California |
| 78 | James Lynch | 37 | Brother | Laborer | Ireland |
| 79 | John Liggins | 32 | Head | Foreman | California |
| 80 | Bessie Liggins | 37 | Wife | — | California |
| 81 | John Liggins | 11 | Son | — | California |
| 82 | Alice Liggins | 6 | Daughter | — | California |
| 83 | James Liggins | 55 | Head | — | California |
| 84 | Emma Liggins | 42 | Wife | — | California |
| 85 | James Liggins | 14 | Son | — | California |
| 86 | Emma Liggins | 12 | Daughter | — | California |
| 87 | William Liggins | 11 | Son | — | California |
| 88 | Joseph Liggins | 9 | Son | — | California |
| 89 | John Lene | 40 | Head | — | California |
| 90 | Margaret Lene | 38 | Wife | — | California |
| 91 | John Lene | 1 | Son | — | California |
| 92 | Frank Vivaldi | 45 | Head | — | Italy |
| 93 | Rose Vivaldi | 40 | Wife | — | Italy |
| 94 | Antone Vivaldi | 20 | Son | — | California |
| 95 | James Casey | 29 | Head | Laborer | California |
| 96 | Catherine Casey | 22 | Wife | — | California |
| 97 | James Casey | 1 | Son | — | California |
| 98 | Mary Corcoran | 74 | Head | — | Ireland |
| 99 | William Corcoran | 39 | Son | — | California |
| 100 | John Mcgrath | 57 | Head | — | Ireland |
Pedigree Summary
John + 2 siblings
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
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)