RD
Ralph Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Ralph Davis across the 1910, 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents George & Mary — first a head (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Davis |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Tarentum Borough |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Shipper |
| Industry | Aluminum Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | No 7 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Shipper |
| Township / Ward | Tarentum Borough |
| Est. Birth Year | ~1910 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ralph | Age | Birth yr |
|---|---|---|---|---|
| Ralph Davis | Head | — | 30 | ~1910 |
| Kenneth Davis | Son | — | 4 | ~1936 |
| Anna Davis | Spouse | — | 27 | ~1913 |
Census Appearances
1910
Allegheny, Pennsylvania
Son, age
Allegheny, Pennsylvania · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Ralph E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Allegheny, Pennsylvania
Son, age 10
Allegheny, Pennsylvania · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 21
Allegheny, Pennsylvania · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Tippet |
| Industry | Aluminum |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 30
Allegheny-County, Pennsylvania · implied b. ~1910 — 3 household members
| Surname | Davis |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Tarentum Borough |
| 1935 Residence (County) | Allegheny |
| Occupation | Shipper |
| Industry | Aluminum Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | No 7 |
| 1935 Residence | Same Place |
| 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 Ralph Davis across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Davis (~0.92 confidence) and mother Mary Davis (~0.92 confidence) and father Fred Davis (~0.92 confidence) and mother Mary Davis (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Davis
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Mary Davis
b. ~1867
Source mother
● Household
· direct · ~0.92
Father
Fred Davis
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Mary Davis
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ralph Davis
Head · 1940 · age 30 · b. ~1910 · Pennsylvania
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03419-00179)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Logan | 59 | Head | Miner | Belgium |
| 2 | Laura Logan | 60 | Wife | — | Belgium |
| 3 | Armin Logan | 25 | Son | Galvanizer | Pennsylvania |
| 4 | Gime Duchesne | 31 | Head | Glass Worker | Belgium |
| 5 | Laura Duchesne | 32 | Wife | — | Pennsylvania |
| 6 | Richard Duchesne | 9 | Son | — | Pennsylvania |
| 7 | Donald Duchesne | 8 | Son | — | Pennsylvania |
| 8 | Eileen Duchesne | 6 | Daughter | — | Pennsylvania |
| 9 | William Pelican | 31 | Head | Laborer | Pennsylvania |
| 10 | Della Pelican | 29 | Wife | — | Pennsylvania |
| 11 | Jane Pelican | 9 | Daughter | — | Pennsylvania |
| 12 | Della M. Pelican | 4 | Daughter | — | Pennsylvania |
| 13 | Edward Durana | 24 | Boarder | Printer | Pennsylvania |
| 14 | John Durana | 20 | Boarder | Truck Driver | Pennsylvania |
| 15 | Edward Salmane | 49 | Head | Shearman | Germany |
| 16 | Mary Salmane | 48 | Wife | — | Germany |
| 17 | Richard Salmane | 20 | Son | Truck Driver | Pennsylvania |
| 18 | Herman Bushman | 75 | Father-in-law | — | Germany |
| 19 | Joseph Emaiser | 52 | Head | Laborer | Czechoslovakia |
| 20 | Rose Emaiser | 48 | Wife | — | Czechoslovakia |
| 21 | Emil Emaiser | 26 | Son | Laborer | Pennsylvania |
| 22 | George Emaiser | 24 | Son | Laborer | Pennsylvania |
| 23 | Helen Emaiser | 20 | Daughter | — | Pennsylvania |
| 24 | Ann Emaiser | 18 | Daughter | Housework | Pennsylvania |
| 25 | Edward Emaiser | 16 | Son | — | Pennsylvania |
| 26 | Rose Marie Emaiser | 9 | Daughter | — | Pennsylvania |
| 27 | George Smeltzer | 50 | Head | Inspector | Pennsylvania |
| 28 | John Smeltzer | 76 | Father | — | Pennsylvania |
| 29 | Belle Smeltzer | 73 | Mother | — | Pennsylvania |
| 30 | Ralph Davis THIS PERSON | 30 | Head | Shipper | Pennsylvania |
| 31 | Anna Davis | 27 | Wife | — | Pennsylvania |
| 32 | Kenneth Davis | 4 | Son | — | Pennsylvania |
| 33 | John Ziman | 37 | Head | Whittler | Czechoslovakia |
| 34 | Josephine Ziman | 33 | Wife | — | Pennsylvania |
| 35 | Mary Ziman | 12 | Daughter | — | Pennsylvania |
| 36 | Eleanor Ziman | 10 | Daughter | — | Pennsylvania |
| 37 | Olive Ziman | 9 | Daughter | — | Pennsylvania |
| 38 | John Ziman | 6 | Son | — | Pennsylvania |
| 39 | Josephine A. Ziman | 2 | Daughter | — | Pennsylvania |
| 40 | — | None | — | — | — |
Pedigree Summary
Ralph
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)