WM
William Mcdonald — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this William Mcdonald across the 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 12-person household.
Age 10
b. ~1920
Male
Son
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | McDonald |
| Given Name | William Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Canada-English |
| 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 | ~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.
12 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Helen Mcdonald | Daughter | — | 7 | ~1923 |
| Margaret Mcdonald | Daughter | — | 9 | ~1921 |
| Alice Mcdonald | Daughter | — | 11 | ~1919 |
| Mary Mcdonald | Daughter | — | 12 | ~1918 |
| William Mcdonald | Head | — | 40 | ~1890 |
| Richard Mcdonald | Son | — | 1 | ~1929 |
| William Mcdonald | Son | — | 10 | ~1920 |
| Edward Mcdonald | Son | — | ~1930 | |
| Robert Mcdonald | Son | — | 8 | ~1922 |
| James Mcdonald | Son | — | 3 | ~1927 |
| John Mcdonald | Son | — | 5 | ~1925 |
| Alice Mcdonald | Spouse | — | 35 | ~1895 |
Census Appearances
1930
San Francisco, …
Son, age 10
San Francisco, California · implied b. ~1920 — 12 household members
| Surname | McDonald |
| Given Name | William Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Canada-English |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Son, age 21
San-Francisco-County, California · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Williard Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | SAN FRANCISCO |
| 1935 Residence (County) | San Francisco |
| Occupation | Butcher |
| Industry | Whole Meat house |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 52 |
| Highest Grade | Hs 2 |
| 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 William Mcdonald across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mcdonald
Son · 1930 · age 10 · b. ~1920 · California
★ You are viewing this record
Sibling
Helen Mcdonald
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Mcdonald
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Mcdonald
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcdonald
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Mcdonald
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcdonald
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcdonald
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mcdonald
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcdonald
Sibling · 1930 · age 9
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:californiacensus00reel206:0602)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Ada E Wall | 40 | Head | Stenographer | California |
| 52 | Marlene Wall | 18 | Daughter | Office Clerk | California |
| 53 | Edward Wall | 12 | Son | — | California |
| 54 | Lydia Symonds | 65 | Head | — | New York |
| 55 | Mildred Symonds | 35 | Daughter | Stenographer | California |
| 56 | Lillian Symonds | 33 | Daughter | Dressmaker | California |
| 57 | William Halle | 45 | Head | Apartment House | Montana |
| 58 | Lillian Halle | 32 | Wife | Housekeeper | Nevada |
| 59 | William Jr Halle | 2 | Son | — | Utah |
| 60 | Jessie Jamieson | 45 | Head | Manager | Minnesota |
| 61 | John Redmond | 40 | Head | Merchant | Russia |
| 62 | Anna Redmond | 35 | Wife | — | Russia |
| 63 | Lilly Kishler | 60 | Head | Private Nurse | Pennsylvania |
| 64 | Gladys Kishler | 35 | Daughter | Statistician | Pennsylvania |
| 65 | John Stephens | 45 | Head | — | Kentucky |
| 66 | Nellie Stephens | 40 | Wife | Accountant | Kentucky |
| 67 | William Mcdonald | 40 | Head | Salesman | Canada-English |
| 68 | Alice Mcdonald | 35 | Wife | — | California |
| 69 | William Jr Mcdonald THIS PERSON | 10 | Son | — | California |
| 70 | Robert Mcdonald | 8 | Son | — | California |
| 71 | John Mcdonald | 5 | Son | — | California |
| 72 | James Mcdonald | 3 | Son | — | California |
| 73 | Richard Mcdonald | 1 | Son | — | California |
| 74 | Edward Mcdonald | 0 | Son | — | California |
| 75 | Mary Mcdonald | 12 | Daughter | — | California |
| 76 | Alice Mcdonald | 11 | Daughter | — | California |
| 77 | Margaret Mcdonald | 9 | Daughter | — | California |
| 78 | Helen Mcdonald | 7 | Daughter | — | California |
| 79 | John Mcdonald | 53 | Head | Salesmanager | Tennessee |
| 80 | Margaret Mcdonald | 51 | Wife | — | Tennessee |
| 81 | John Jr Mcdonald | 21 | Son | Asst Superintendent | Tennessee |
| 82 | Margaret Mcdonald | 19 | Daughter | — | Tennessee |
| 83 | William Mcdonald | 17 | Son | — | California |
| 84 | Leo Katz | 40 | Head | Salesman | California |
| 85 | Rose Katz | 35 | Wife | Saleswoman | New York |
| 86 | Marvin Katz | 10 | Son | — | California |
| 87 | John Mclean | 45 | Head | — | Canada-English |
| 88 | Isabel Mclean | 40 | Wife | — | Australia |
| 89 | John Jr Mclean | 15 | Son | — | California |
| 90 | William Mclean | 38 | Head | Plasterer | Scotland |
| 91 | Isabel Mclean | 35 | Wife | — | Scotland |
| 92 | William Jr Mclean | 12 | Son | — | Scotland |
| 93 | Isabel Mclean | 10 | Daughter | — | California |
| 94 | Robert Mclean | 8 | Son | — | California |
| 95 | John Mclean | 6 | Son | — | California |
| 96 | James Mclean | 4 | Son | — | California |
| 97 | Margaret Mclean | 2 | Daughter | — | California |
| 98 | Isabel Mclean | 0 | Daughter | — | California |
| 99 | James Fisher | 41 | Head | Estimator | Wisconsin |
| 100 | Rebecca Fisher | 40 | Wife | — | Kentucky |
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)