JM
John Mcgrath — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this John Mcgrath across the 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 10-person household.
Age 11
b. ~1929
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | McGrath |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Denver City & County |
| 1935 Residence (County) | Denver |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Denver City County |
| Est. Birth Year | ~1929 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Liola Mcgrath | Daughter | — | 17 | ~1923 |
| Liala Mcgrath | Daughter | — | 19 | ~1921 |
| Josephine Mcgrath | Daughter | — | 14 | ~1926 |
| Virginia Mcgrath | Daughter | — | 2 | ~1938 |
| Ruby Mcgrath | Daughter | — | 4 | ~1936 |
| Trinidad Mcgrath | Head | — | 49 | ~1891 |
| Alven Mcgrath | Son | — | 13 | ~1927 |
| Lawrence Mcgrath | Son | — | 8 | ~1932 |
| John Mcgrath | Son | — | 11 | ~1929 |
| Lucinda Mcgrath | Spouse | — | 46 | ~1894 |
Census Appearances
1930
Denver, Colorado
Son, age
Denver, Colorado · implied b. ~1930 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | New Mexico |
| Mother's Birthplace | New Mexico |
| Occupation | none |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Denver-County, Colorado
Son, age 11
Denver-County, Colorado · implied b. ~1929 — 10 household members
| Surname | McGrath |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Denver City & County |
| 1935 Residence (County) | Denver |
| Industry | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Mcgrath across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mcgrath
Son · 1940 · age 11 · b. ~1929 · Colorado
★ You are viewing this record
Sibling
Liala Mcgrath
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Liola Mcgrath
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Mcgrath
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Mcgrath
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Mcgrath
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alven Mcgrath
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruby Mcgrath
Sibling · 1940 · age 4
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 — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00492-00336)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Franklin Blehm | 6 | Son | — | Colorado |
| 2 | Betty Blehm | 5 | Daughter | — | Colorado |
| 3 | Ray Wasinger | 30 | Head | Electrician | Colorado |
| 4 | Helen Wasinger | 23 | Wife | — | Kansas |
| 5 | Ellen Wasinger | 3 | Daughter | — | Colorado |
| 6 | Maurice Trujillo | 43 | Head | Laborer | Colorado |
| 7 | Isabell Trujillo | 43 | Wife | — | New Mexico |
| 8 | Angelina Trujillo | 9 | Daughter | — | Colorado |
| 9 | George Trujillo | 25 | Head | Laborer | Colorado |
| 10 | Esperanza Trujillo | 20 | Wife | — | Colorado |
| 11 | Trinidad Mcgrath | 49 | Head | — | New Mexico |
| 12 | Lucinda Mcgrath | 46 | Wife | — | New Mexico |
| 13 | Liala Mcgrath | 19 | Daughter | Recretalian | New Mexico |
| 14 | Liola Mcgrath | 17 | Daughter | — | New Mexico |
| 15 | Josephine Mcgrath | 14 | Daughter | — | Colorado |
| 16 | Alven Mcgrath | 13 | Son | — | Colorado |
| 17 | John Mcgrath THIS PERSON | 11 | Son | — | Colorado |
| 18 | Lawrence Mcgrath | 8 | Son | — | Colorado |
| 19 | Ruby Mcgrath | 4 | Daughter | — | Colorado |
| 20 | Virginia Mcgrath | 2 | Daughter | — | Colorado |
| 21 | Mary Mcgeever | 86 | Head | — | New York |
| 22 | Nell Mcgeever | 55 | Daughter | — | California |
| 23 | Sadie Mcgeever | 59 | Daughter | — | Colorado |
| 24 | Willa Selby | 25 | Daughter | — | Colorado |
| 25 | Edward Moreno | 32 | Head | Laborer | Texas |
| 26 | Marian Moreno | 23 | Wife | — | New Mexico |
| 27 | Dora Moreno | 6 | Daughter | — | Wyoming |
| 28 | Edward Jr. Moreno | 4 | Son | — | Colorado |
| 29 | Ernest Moreno | 2 | Son | — | Colorado |
| 30 | Marten Moreno | 1 | Son | — | Colorado |
| 31 | Frank Moreno | 30 | Head | Laborer | Colorado |
| 32 | Della Moreno | 29 | Wife | — | Colorado |
| 33 | Henry Miller | 40 | Head | Laborer | Colorado |
| 34 | Myrtle Miller | 38 | Wife | — | Colorado |
| 35 | Darline Miller | 20 | Daughter | — | Colorado |
| 36 | Jake Miller | 62 | Father | — | Colorado |
| 37 | Joseph A. Alrid | 29 | Head | Laborer | New Mexico |
| 38 | Ruby Alrid | 26 | Wife | — | Colorado |
| 39 | Alice Trujillo | 18 | Sister-in-law | — | Colorado |
| 40 | Albert Alarid | 15 | Brother | — | Colorado |
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)