DM
David Murphy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this David Murphy across the 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a head (b.~1887), then head of a 6-person household.
Age 43
b. ~1887
Male
Head
Born: Irish Free State
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Murphy |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Naturalization Status | Naturalized |
| Year of Immigration | 1906 |
| Age at First Marriage | 26 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Occupation | Fireman |
| Industry | City Dept |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 7500 |
| Radio Set | R |
| Birthplace (normalized) | irish free state |
| Occupation | Fireman |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1887 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| David Murphy | Head | — | 43 | ~1887 |
| Cecilia Murphy | Daughter | — | 13 | ~1917 |
| Jerome Murphy | Son | — | 9 | ~1921 |
| Helena Murphy | Spouse | — | 46 | ~1884 |
| Timothy Murphy | Son | — | 15 | ~1915 |
| Catherine Murphy | Daughter | — | 4 | ~1926 |
Census Appearances
1930
San Francisco, …
Head, age 43
San Francisco, California · implied b. ~1887 — 6 household members
| Surname | Murphy |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Naturalization Status | Naturalized |
| Year of Immigration | 1906 |
| Age at First Marriage | 26 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Fireman |
| Industry | City Dept |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 7500 |
| Radio Set | R |
| Birthplace (normalized) | irish free state |
1940
San-Francisco-County, California
Head, age 53
San-Francisco-County, California · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Murphy |
| Given Name | Daniel P |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Naturalization Status | Naturalized |
| Occupation | Laborer |
| Industry | Water Dept. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
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 David Murphy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
David Murphy
Head · 1930 · age 43 · b. ~1887 · 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
49 people indexed on this census page (ia:1930:californiacensus00reel201:0541)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Daniel J. Murphy | 47 | Head | Cashier | California |
| 2 | Lillian M. Murphy | 44 | Wife | — | California |
| 3 | Harold F. Murphy | 19 | Son | Timekeeper | California |
| 4 | Lillian M. Murphy | 20 | Daughter | Typist | California |
| 5 | Leo Holbe | 53 | Head | Shipping Clerk | Russia |
| 6 | Gussie Holbe | 52 | Wife | — | Russia |
| 7 | Ethel Holbe | 30 | Daughter | Saleslady | California |
| 8 | Robert J. Harrison | 39 | Husband | Salesman | California |
| 9 | Anna L. Harrison | 36 | Wife | — | California |
| 10 | Walter Coles | 44 | Head | Contractor | Alabama |
| 11 | Harry H. Coles | 39 | Brother | Contractor | Alabama |
| 12 | John F. Scheffler | 65 | Head | — | Ohio |
| 13 | Catherine Scheffler | 62 | Wife | — | New York |
| 14 | Maurice Sullivan | 44 | Head | Plumber | California |
| 15 | Georgia E. Sullivan | 41 | Wife | — | California |
| 16 | Bob Sullivan | 17 | Son | — | California |
| 18 | David Murphy THIS PERSON | 43 | Head | Fireman | Irish Free State |
| 19 | Helena Murphy | 46 | Wife | — | Irish Free State |
| 20 | Timothy Murphy | 15 | Son | — | California |
| 21 | Cecilia Murphy | 13 | Daughter | — | California |
| 22 | Jerome Murphy | 9 | Son | — | California |
| 23 | Catherine Murphy | 4 | Daughter | — | California |
| 24 | George Johnston | 41 | Head | Salesman | California |
| 25 | Jessie Johnston | 35 | Wife | — | California |
| 26 | Harrietta Johnston | 12 | Daughter | — | California |
| 27 | August Schaefer | 50 | Head | Weighmaster | Germany |
| 28 | Evelyn Schaefer | 53 | Wife | — | California |
| 29 | August M. Schaefer | 21 | Son | Clerk | California |
| 30 | Mary Schaefer | 16 | Daughter | — | California |
| 31 | Harry Scott | 33 | Head | Locomotive Engineer | California |
| 32 | Lillian M. Scott | 35 | Wife | — | California |
| 33 | Lois B. Scott | 7 | Daughter | — | California |
| 34 | Jean H. Scott | 3 | Daughter | — | California |
| 35 | Charles Demory | 41 | Head | Assistant Manager | California |
| 36 | Catherine D. Demory | 37 | Wife | Buyer | Nebraska |
| 37 | Richard J. Demory | 19 | Son | Clerk | California |
| 38 | Henry Honnet | 31 | Head | Police | Nebraska |
| 39 | Rose Honnet | 30 | Wife | — | California |
| 40 | Doreene Honnet | 10 | Daughter | — | California |
| 41 | Helen Mccarthy | 32 | Head | Bookkeeper | Kentucky |
| 42 | Clara Rhodes | 56 | Sister | — | Pennsylvania |
| 43 | Florence M. Rhodes | 23 | Niece | Organist | Honolulu T.H. |
| 44 | Ruth M. Rhodes | 19 | Niece | — | Honolulu T.H. |
| 45 | Charles Mccarthy | 52 | Head | Dentist | Pennsylvania |
| 46 | Jane M. Mccarthy | 54 | Wife | — | California |
| 47 | Joseph P. Mccarthy | 23 | Son | — | California |
| 48 | Lucile A. Mccarthy | 21 | Daughter | Dental Assistant | California |
| 49 | Serene M. Mccarthy | 19 | Daughter | — | California |
| 50 | Jane M. Mccarthy | 13 | 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)