JM
James Mann — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Alameda, California
Our Model Tree links this James Mann across the 1930 and 1940 US Censuses in Alameda, California (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 6-person household.
Age 53
b. ~1877
Male
Head
Born: Scotland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Alameda, California |
| Surname | Mann |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1906 |
| Age at First Marriage | 23 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Additional Details | |
| Occupation | Pattern Maker |
| Industry | Iron Works |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 45 |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Pattern Maker |
| Township / Ward | Oakland City Part |
| Est. Birth Year | ~1877 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mann | Spouse | — | 53 | ~1877 |
| James Mann | Son | — | 24 | ~1906 |
| Euphamia Mann | Daughter | — | 23 | ~1907 |
| Isabel Mann | Daughter | — | 19 | ~1911 |
| Davina Mann | Daughter | — | 15 | ~1915 |
| James Mann | Head | — | 53 | ~1877 |
Census Appearances
1930
Alameda, California
Head, age 53
Alameda, California · implied b. ~1877 — 6 household members
| Surname | Mann |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1906 |
| Age at First Marriage | 23 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Pattern Maker |
| Industry | Iron Works |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 45 |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
San-Francisco-County, California
Head, age 63
San-Francisco-County, California · implied b. ~1877
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Main |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| 1935 Residence (City) | Omaha |
| Naturalization Status | Naturalized |
| Occupation | Gardener |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 208 |
| Highest Grade | No 8 |
| 1935 Residence | Nebraska |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Mann across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
James Mann
Head · 1930 · age 53 · b. ~1877 · 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 — Alameda, California
Open full size
1930 US Federal Census — Alameda, California
Page Contents
50 people indexed on this census page (ia:1930:15thcensuspopula103unit:0523)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Blanch Burris | 52 | Head | Inventory Clerk | South Dakota |
| 52 | Loren Burris | 20 | Son | — | South Dakota |
| 53 | Gerald Burris | 19 | Son | Florist Clerk | South Dakota |
| 54 | Henry Burris | 18 | Son | — | South Dakota |
| 55 | Earl Sammons | 44 | Head | Artist | Nebraska |
| 56 | Gwen Sammons | 36 | Wife | — | California |
| 57 | Ruth H. Crandall | 37 | Head | Musician | California |
| 58 | Oscar Kummer | 48 | Head | Salesman | Illinois |
| 59 | Mary Kummer | 26 | Wife | Phone Operator | California |
| 60 | Frank Bercovitch | 22 | Brother-in-law | Service Man | California |
| 61 | Charles A. Monson | 75 | Head | — | Illinois |
| 62 | Mary E. Monson | 65 | Wife | — | Wisconsin |
| 63 | Margaret Campbell | 59 | Head | — | California |
| 64 | George H. Jr. Campbell | 28 | Son | Billing Clerk | California |
| 65 | Bill E. Chaney | 38 | Head | Cook | California |
| 66 | Melvin G. Chaney | 19 | Son | — | California |
| 67 | Irma L. Chaney | 17 | Daughter | — | California |
| 68 | Arthur Hansen | 30 | Lodger | Furniture Sprayer | Sweden |
| 69 | James F. Eckstrom | 66 | Head | Vice President | California |
| 70 | Jessie Eckstrom | 44 | Wife | — | California |
| 71 | Robert G. Eckstrom | 22 | Son | — | California |
| 72 | Matsu Mendori | 54 | Servant | Servant | Japan |
| 73 | Harry Benner | 59 | Head | Asst Manager | California |
| 74 | Harrienne Benner | 63 | Wife | — | Maine |
| 75 | Helen L. Campbell | 68 | Sister-in-law | — | Maine |
| 76 | Christine Eckstrom | 80 | Head | — | Scotland |
| 77 | Isabell G. Eckstrom | 35 | Daughter | Stenographer | California |
| 78 | William L. Cuber | 68 | Head | Secretary | Wisconsin |
| 79 | Margaret D. Cuber | 67 | Wife | — | California |
| 80 | Burt P. Greenman | 64 | Head | Cashier | New York |
| 81 | Mathilde C. Greenman | 66 | Wife | — | Pennsylvania |
| 82 | Elizabeth Bishop | 76 | Head | — | New York |
| 83 | Elizabeth M. Bishop | 69 | Companion | Companion | Maine |
| 84 | Charles S. Damon | 64 | Head | Accountant | Massachusetts |
| 85 | Maude C. Damon | 74 | Wife | — | Nova Scotia |
| 86 | James S. Higgins | 24 | Lodger | Manager | Colorado |
| 87 | John A. Mccarthy | 39 | Lodger | Salesman | California |
| 88 | Howard D. Rontree | 52 | Head | Engineer | Nebraska |
| 89 | Nellie E. Rontree | 46 | Wife | — | Nebraska |
| 90 | James Mann THIS PERSON | 53 | Head | Pattern Maker | Scotland |
| 91 | Margaret Mann | 53 | Wife | — | Scotland |
| 92 | James S. Mann | 24 | Son | Chauffeur | Scotland |
| 93 | Euphamia B. Mann | 23 | Daughter | Clerk | New York |
| 94 | Isabel J. Mann | 19 | Daughter | — | Nebraska |
| 95 | Davina J. Mann | 15 | Daughter | — | Nebraska |
| 96 | Eugene Lassalle | 70 | Head | — | South France |
| 97 | Denise Lassalle | 67 | Wife | — | California |
| 98 | Florence Lassalle | 33 | Daughter | — | California |
| 99 | Eugene J. Lassalle | 43 | Son | Chain Man | California |
| 100 | Clerk Dewey | 50 | Head | Salesman | Iowa |
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)