MH
Mary Haas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lehigh-County, Pennsylvania
Our Model Tree links this Mary Haas across the 1930 and 1940 US Censuses in Lehigh-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 6-person household.
Age 52
b. ~1888
Female
Spouse
Born: Czechoslovakia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lehigh-County, Pennsylvania |
| Surname | Haas |
| Given Name | Mary K. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Czechoslovakia |
| 1935 Residence (City) | Cementon |
| 1935 Residence (County) | Lehigh |
| Naturalization Status | Alien |
| Additional Details | |
| Industry | 0 |
| Class of Worker | no |
| Highest Grade | S 6 |
| 1935 Residence | Same House |
| Birth Country | Czechoslovakia |
| Birthplace (normalized) | czechoslovakia |
| Township / Ward | Cementon |
| Est. Birth Year | ~1888 |
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 |
|---|---|---|---|---|
| Frank Haas | Son | — | 17 | ~1923 |
| Mary Haas | Spouse | — | 52 | ~1888 |
| Anna Haas | Daughter | — | 20 | ~1920 |
| Joseph Haas | Head | — | 57 | ~1883 |
| Bernard Haas | Son | — | 9 | ~1931 |
| Catherine Haas | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Lehigh, Pennsylvania
Spouse, age 43
Lehigh, Pennsylvania · implied b. ~1887 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Haas |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Czechoslovakia |
| Naturalization Status | Alien |
| Year of Immigration | 1910 |
| Age at First Marriage | 23 |
| Father's Birthplace | Czechoslovakia |
| Mother's Birthplace | Czechoslovakia |
| Can Read/Write | Yes |
| Mother Tongue | Czech |
| Birth Country | Czechoslovakia |
| Birthplace (normalized) | czechoslovakia |
1940
Lehigh-County, Pennsylvania
Spouse, age 52
Lehigh-County, Pennsylvania · implied b. ~1888 — 6 household members
| Surname | Haas |
| Given Name | Mary K. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Czechoslovakia |
| 1935 Residence (City) | Cementon |
| 1935 Residence (County) | Lehigh |
| Naturalization Status | Alien |
| Industry | 0 |
| Class of Worker | no |
| Highest Grade | S 6 |
| 1935 Residence | Same House |
| Birth Country | Czechoslovakia |
| Birthplace (normalized) | czechoslovakia |
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 Haas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Haas
Spouse · 1940 · age 52 · b. ~1888 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Lehigh-County, Pennsylvania
Open full size
1940 US Federal Census — Lehigh-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03548-00407)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank J. Wagner | 15 | Son | — | Pennsylvania |
| 42 | Ferdinand F. Wagner | 12 | Son | — | Pennsylvania |
| 43 | August Wagner | 11 | Son | — | Pennsylvania |
| 44 | Johanna Wagner | 9 | Daughter | — | Pennsylvania |
| 45 | Adolph Wagner | 8 | Son | — | Pennsylvania |
| 46 | Helen Wagner | 6 | Daughter | — | Pennsylvania |
| 47 | John Wagner | 4 | Son | — | Pennsylvania |
| 48 | Margaret Wagner | 1 | Daughter | — | Pennsylvania |
| 49 | Joseph J. Haas | 57 | Head | Laborer | Czechoslovakia |
| 50 | Mary K. Haas THIS PERSON | 52 | Wife | — | Czechoslovakia |
| 51 | Anna G. Haas | 20 | Daughter | Tacker | Pennsylvania |
| 52 | Frank S. Haas | 17 | Son | Floor Boy | Pennsylvania |
| 53 | Catherine M. Haas | 15 | Daughter | — | Pennsylvania |
| 54 | Bernard Haas | 9 | Son | — | Pennsylvania |
| 55 | Michael J. Tomline | 37 | Head | Laborer | Czechoslovakia |
| 56 | Mary R. Tomline | 28 | Wife | — | Pennsylvania |
| 57 | Dorothy Tomline | 6 | Daughter | — | Pennsylvania |
| 58 | Margaret Tomline | 1 | Daughter | — | Pennsylvania |
| 59 | Jacob P. Tomline | 60 | Head | Laborer | Czechoslovakia |
| 60 | Verna A. Tomline | 52 | Wife | — | Czechoslovakia |
| 61 | Andrew B. Tomline | 24 | Son | Laborer | Pennsylvania |
| 62 | Catherin A. Tomline | 20 | Daughter | Sewer | Pennsylvania |
| 63 | Anna G. Tomline | 18 | Daughter | Sewer | Pennsylvania |
| 64 | Stephen J. Tomline | 13 | Son | — | Pennsylvania |
| 65 | Stephen Bodnar | 54 | Head | Laborer | Ukrania |
| 66 | Caterin Bodnar | 28 | Daughter | Sewer | Pennsylvania |
| 67 | Joseph Bodnar | 25 | Son | Laborer | Pennsylvania |
| 68 | Sophia Bodnar | 21 | Daughter | Trimmer | Pennsylvania |
| 69 | Mary Bodnar | 18 | Daughter | — | Pennsylvania |
| 70 | Michael Bodnar | 17 | Son | Presser | Pennsylvania |
| 71 | John Bodnar | 14 | Son | — | Pennsylvania |
| 72 | Andrew Bodnar | 12 | Son | — | Pennsylvania |
| 73 | Rose Bodnar | 11 | Daughter | — | Pennsylvania |
| 74 | Martin J. Saganowich | 65 | Head | Laborer | Galicia |
| 75 | Mary A. Saganowich | 49 | Wife | — | Galicia |
| 76 | Joseph Saganowich | 26 | Nephew | Caretaker | Pennsylvania |
| 77 | Anna C. Saganowich | 24 | Wife/Niece | — | Pennsylvania |
| 78 | Joseph Saganowich | 5 | Son | — | Pennsylvania |
| 79 | Stanley Saganowich | 4 | Son | — | Pennsylvania |
| 80 | Barbara Saganowich | 2 | Daughter | — | Pennsylvania |
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)