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Mary Mclean — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Mary Mclean across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 10-person household.
Age 10
b. ~1930
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | McLean |
| Given Name | Mary I. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | N. Long Beach |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Compton City |
| Est. Birth Year | ~1930 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Carol Mclean | Daughter | — | 10 | ~1930 |
| Rose Mclean | Daughter | — | 12 | ~1928 |
| Mary Mclean | Daughter | — | 10 | ~1930 |
| Paul Mclean | Head | — | 47 | ~1893 |
| George Hale | Other | — | 82 | ~1858 |
| George Mclean | Son | — | 21 | ~1919 |
| Roderick Mclean | Son | — | 15 | ~1925 |
| Paul Mclean | Son | — | 23 | ~1917 |
| John Mclean | Son | — | 7 | ~1933 |
| Irine Mclean | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Los Angeles, …
Daughter, age
Los Angeles, California · implied b. ~1930 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McLean |
| Given Name | Margaret L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Daughter, age 10
Los-Angeles-County, California · implied b. ~1930 — 10 household members
| Surname | McLean |
| Given Name | Mary I. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | N. Long Beach |
| 1935 Residence (County) | Los Angeles |
| Highest Grade | 4 |
| 1935 Residence | California |
| 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 Mary Mclean across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mclean
Daughter · 1940 · age 10 · b. ~1930 · California
★ You are viewing this record
Sibling
John Mclean
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roderick Mclean
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Mclean
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Mclean
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Mclean
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carol Mclean
Sibling · 1940 · age 10
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 — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00223-00353)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Donald S. Smith | 1 | son | — | California |
| 42 | Claud F. Sloan | 51 | Head | Mechanic | Louisiana |
| 43 | L. Maud Sloan | 46 | wife | — | Texas |
| 44 | Claud F. Sloan | 25 | son | Boat Builder | Colorado |
| 45 | Clinton Wurts | 57 | Head | Driller | Ohio |
| 46 | Ruby Wurts | 35 | wife | Housekeeping | Kansas |
| 47 | Paul A. Mclean | 47 | Head | Stillman | Colorado |
| 48 | Irine L. Mclean | 43 | wife | — | New York |
| 49 | Paul J. Mclean | 23 | son | Cook | Colorado |
| 50 | George D. Mclean | 21 | son | New Worker | Colorado |
| 51 | Roderick Mclean | 15 | son | Carpenter | Colorado |
| 52 | Mary I. Mclean THIS PERSON | 10 | daughter | — | California |
| 53 | Rose T. Mclean | 12 | daughter | — | California |
| 54 | Carol J. Mclean | 10 | daughter | — | California |
| 55 | John N. Mclean | 7 | son | — | California |
| 56 | George P. Hale | 82 | Fatherinlaw | — | Vermont |
| 57 | Elizabeth M. Wrozena | 53 | Head | — | Texas |
| 58 | Joseph J. Wrozena | 22 | son | Groundman | Texas |
| 59 | Thomas D. Wrozena | 15 | son | Helper | Wyoming |
| 60 | John H. Riddick | 29 | Head | Truck Driver | Arizona |
| 61 | Berta Riddick | 33 | wife | — | Texas |
| 62 | Edward L. Riddick | 16 | son | — | Texas |
| 63 | John J. Riddick | 9 | son | — | California |
| 64 | Ralph E. Mcmakin | 33 | Head | V. Principal | Nebraska |
| 65 | Hope E. Mcmakin | 29 | wife | — | California |
| 66 | Paul H. Mcmakin | 7 | son | — | California |
| 67 | Robert G. Mcmakin | 5 | son | — | California |
| 68 | Tom Jr. Prestwood | 30 | Head | Bricklayer | England |
| 69 | Edith C. Prestwood | 33 | wife | Bookkeeper | Wyoming |
| 70 | Richard Allen | 34 | Lodger | Laborer | Kansas |
| 71 | Augustus L. Schramm | 57 | Head | Truck Driver | Iowa |
| 72 | David R. Dalgleish | 47 | Head | Dist. Operator | Utah |
| 73 | Dee L. Dalgleish | 37 | wife | — | Utah |
| 74 | Thos. E. Dalgleish | 14 | son | — | Utah |
| 75 | Ilene R. Dalgleish | 5 | son | — | California |
| 76 | Fred A. Metzger | 31 | Head | Rig Builder | Pennsylvania |
| 77 | Bernice A. Metzger | 31 | wife | — | California |
| 78 | Thomas H. Parker | 55 | Head | Operator | California |
| 79 | Ruby L. Parker | 49 | wife | — | California |
| 80 | Kallip Farrow | 59 | brotherinlaw | Helper | California |
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)