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Mary Lopez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Beaver-County, Pennsylvania
Our Model Tree links this Mary Lopez across the 1930 and 1940 US Censuses in Beaver-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 6-person household.
Age 12
b. ~1928
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Beaver-County, Pennsylvania |
| Surname | Lopez |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Midland Boro |
| 1935 Residence (County) | Beaver |
| Additional Details | |
| Industry | 0 |
| Highest Grade | Yes 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Midland Boro |
| Est. Birth Year | ~1928 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Consuela Lopez | Daughter | — | 13 | ~1927 |
| Manuela Lopez | Spouse | — | 45 | ~1895 |
| Martina Lopez | Daughter | — | 5 | ~1935 |
| Faustino Lopez | Head | — | 52 | ~1888 |
| Marie Lopez | Daughter | — | 15 | ~1925 |
| Mary Lopez | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Beaver, Pennsylvania
Daughter, age 2
Beaver, Pennsylvania · implied b. ~1928 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lopez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mexican |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Beaver-County, Pennsylvania
Daughter, age 12
Beaver-County, Pennsylvania · implied b. ~1928 — 6 household members
| Surname | Lopez |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Midland Boro |
| 1935 Residence (County) | Beaver |
| Industry | 0 |
| Highest Grade | Yes 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Lopez across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Lopez
Daughter · 1940 · age 12 · b. ~1928 · Pennsylvania
★ You are viewing this record
Sibling
Martina Lopez
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Lopez
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Consuela Lopez
Sibling · 1940 · age 13
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 — Beaver-County, Pennsylvania
Open full size
1940 US Federal Census — Beaver-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03428-00378)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Milan Lona | 1 | son | — | Ohio |
| 42 | Mary Lona | 53 | mother | — | Mexico |
| 43 | Faustino Lopez | 52 | head | Chipper | Mexico |
| 44 | Manuela Lopez | 45 | wife | — | Mexico |
| 45 | Marie Lopez | 15 | daughter | — | Pennsylvania |
| 46 | Consuela Lopez | 13 | daughter | — | Pennsylvania |
| 47 | Mary Lopez THIS PERSON | 12 | daughter | — | Pennsylvania |
| 48 | Martina Lopez | 5 | daughter | — | Pennsylvania |
| 49 | Alphonso Tona | 21 | head | Roller Lineman | Pennsylvania |
| 50 | Mary Tona | 21 | wife | — | Pennsylvania |
| 51 | Michael Tona | 1 | son | — | Ohio |
| 52 | Thomas Turkely | 52 | head | Steel Pourer | Yugo Slavia |
| 53 | Mary Turkely | 48 | wife | — | Yugo Slavia |
| 54 | Joseph Turkely | 17 | son | — | New York |
| 55 | Nick Turkely | 16 | son | — | New York |
| 56 | Anna Turkely | 12 | daughter | — | Ohio |
| 57 | Agnes Turkely | 10 | daughter | — | Pennsylvania |
| 58 | John De Prospero | 42 | head | Bricklayer | Italy |
| 59 | Esteria De Prospero | 33 | wife | — | Italy |
| 60 | Lydia De Prospero | 7 | daughter | — | Italy |
| 61 | Mary De Prospero | 0 | daughter | — | Ohio |
| 62 | Mauro Leonardis | 52 | lodger | Laborer | Italy |
| 63 | Ziva Gimbus | 65 | head | Janitor | Yugo Slavia |
| 64 | Mary Gimbus | 59 | wife | — | Yugo Slavia |
| 65 | Kathrina Gimbus | 18 | daughter | — | Pennsylvania |
| 66 | Steve Gimbus | 24 | son | Screw Boy | Pennsylvania |
| 67 | Helen Gimbus | 20 | daughter-in-law | — | Pennsylvania |
| 68 | Thomas Gimbus | 0 | grandson | — | Ohio |
| 69 | John Ratkovich | 51 | head | Blacksmith Helper | Yugo Slavia |
| 70 | Firma Ratkovich | 42 | wife | — | Romania |
| 71 | Elizabeth Ratkovich | 15 | daughter | — | Pennsylvania |
| 72 | Samuel Ratkovich | 12 | son | — | Pennsylvania |
| 73 | Emil Ratkovich | 7 | son | — | Pennsylvania |
| 74 | Stanley Sr. Cica | 48 | head | First Helper Open Hearth | Yugo Slavia |
| 75 | Stanley Jr. Cica | 12 | son | — | Pennsylvania |
| 76 | Robert Loncar | 22 | step-son | Bricklayer Helper | Pennsylvania |
| 77 | Maxine Loncar | 21 | step-daughter-in-law | Ware Brusher | Ohio |
| 78 | Carol Loncar | 1 | step-granddaughter | — | West Virginia |
| 79 | Milan Kosanovich | 51 | head | Conductor | Yugo Slavia |
| 80 | Mila Kosanovich | 41 | wife | — | Yugo Slavia |
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)