RD
Ralph Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Multnomah-County, Oregon
Our Model Tree links this Ralph Davis across the 1920, 1930 and 1940 US Censuses in Multnomah-County, Oregon (XGBoost, ~Confirmed), with identified parents Ralph & Ralph — first a son (b.~1920), then head of a 4-person household.
Age 20
b. ~1920
Male
Son
Born: Oregon
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Multnomah-County, Oregon |
| Surname | Davis |
| Given Name | Ralph Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Umatilla |
| Additional Details | |
| Occupation | laborer |
| Industry | railroad section gang |
| Class of Worker | PW |
| Income (1939) | 100 |
| Highest Grade | Hs 4 |
| 1935 Residence | Oregon |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Occupation | Laborer |
| Township / Ward | Portland City |
| Est. Birth Year | ~1920 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ralph | Age | Birth yr |
|---|---|---|---|---|
| Ralph Davis | Head | — | 45 | ~1895 |
| Ralph Davis | Son | — | 20 | ~1920 |
| William Davis | Son | — | 16 | ~1924 |
| Maudie Davis | Spouse | — | 39 | ~1901 |
Census Appearances
1920
Multnomah, Oregon
Son, age
Multnomah, Oregon · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Ralph J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Illinois |
| Mother's Birthplace | New York |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1930
Multnomah, Oregon
Son, age 10
Multnomah, Oregon · implied b. ~1920 — 5 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 | Oregon |
| Father's Birthplace | Illinois |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
Multnomah-County, Oregon
Son, age 20
Multnomah-County, Oregon · implied b. ~1920 — 4 household members
| Surname | Davis |
| Given Name | Ralph Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Umatilla |
| Occupation | laborer |
| Industry | railroad section gang |
| Class of Worker | PW |
| Income (1939) | 100 |
| Highest Grade | Hs 4 |
| 1935 Residence | Oregon |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Ralph Davis (~0.92 confidence) and father Ralph Davis (~0.92 confidence) and mother Frances Davis (~0.92 confidence) and father Ralph Davis (~0.92 confidence) and mother Maudie Davis (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ralph Davis
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Ralph Davis
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Frances Davis
b. ~1893
Source mother
● Household
· direct · ~0.92
Father
Ralph Davis
b. ~1895
Source father
● Household
· direct · ~0.92
Mother
Maudie Davis
b. ~1901
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ralph Davis
Son · 1940 · age 20 · b. ~1920 · Oregon
★ You are viewing this record
Sibling
William Davis
Sibling · 1940 · age 16
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 — Multnomah-County, Oregon
Open full size
1940 US Federal Census — Multnomah-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03392-00082)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary E Frantz | 67 | Head | — | Virginia |
| 42 | Emma S Patrick | 68 | Head | — | Illinois |
| 43 | Edward S Dunton | 40 | Head | Painter | Minnesota |
| 44 | Blanche Dunton | 38 | Wife | — | Kansas |
| 45 | Sefus Grabow | 40 | Head | Operator | Nebraska |
| 46 | Graham Grabow | 17 | Daughter | — | Nebraska |
| 47 | Harold D Lynn | 46 | Head | Supervisor | Washington |
| 48 | Violet S Lynn | 44 | Wife | Manager | Nebraska |
| 49 | Verna Urban | 31 | Head | Clerk | Kansas |
| 50 | Marie Cameron | 28 | Partner | Clerk | Canada |
| 51 | Ruth S Hayes | 41 | Head | Telephone Operator | Minnesota |
| 52 | Raymond De Merritt | 18 | Son | — | Portland |
| 53 | Ray De Merritt | 43 | Lodger | Salesman | Oregon |
| 54 | William S Heath | 30 | Head | Operator | Iowa |
| 55 | Ruth Heath | 28 | Wife | Bookkeeper | Oregon |
| 56 | Nell Gilmore | 57 | Mother | — | Nebraska |
| 57 | Moe Ruvenky | 47 | Head | Shoe Clerk | Oregon |
| 58 | Naomi S Ruvenky | 30 | Wife | — | Montana |
| 59 | Charles S Moore | 54 | Head | Operator | Texas |
| 60 | Charles S Knight | 45 | Head | Painter | Washington |
| 61 | Alice B Knight | 43 | Wife | Waitress | Missouri |
| 62 | George S Stump | 32 | Head | Off Clerk | Kansas |
| 63 | Leon F S Slater | 38 | Head | Fireman | Pennsylvania |
| 64 | Frank Yazelino | 41 | Head | Foreman | Italy |
| 65 | Florence Yazelino | 28 | Wife | Proprietor | Italy |
| 66 | Frank J Yazelino | 10 | Son | — | Oregon |
| 67 | Ralph S Davis | 45 | Head | Telegrapher | Oregon |
| 68 | Maudie S Davis | 39 | Wife | — | Missouri |
| 69 | Ralph Jr. Davis THIS PERSON | 20 | Son | Laborer | Oregon |
| 70 | William Davis | 16 | Son | — | Oregon |
| 71 | Esther S Olsen | 41 | Head | English Teacher | Oregon |
| 72 | Raymond Jacobsen | 50 | Head | Radio Operator | Iowa |
| 73 | Alison Jacobsen | 36 | Wife | Contomptometer Operator | Missouri |
| 74 | Jessie A Skinner | 63 | Head | Music Teacher | Kansas |
| 75 | Katherine S Lewis | 57 | Head | Housework | England |
| 76 | Madonna Lewis | 22 | Daughter | Stewardess | Montana |
| 77 | Jack V Moore | 35 | Head | Salesman | Oregon |
| 78 | Helen S Moore | 24 | Wife | Clerk | Washington |
| 79 | Bruce S Higby | 28 | Head | Credit Man | Idaho |
| 80 | Jessie Higby | 25 | Wife | Clerk | Oregon |
Pedigree Summary
Ralph + 1 sibling
Gen 1 · 5 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)