JD
John Donahue — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cumberland-County, Maine
Our Model Tree links this John Donahue across the 1920, 1930 and 1940 US Censuses in Cumberland-County, Maine (XGBoost, ~Confirmed), with identified parents Lena & Lena — first a son (b.~1919), then head of a 7-person household.
Age 21
b. ~1919
Male
Son
Born: Maine
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cumberland-County, Maine |
| Surname | Donahue |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maine |
| 1935 Residence (City) | Portland City |
| 1935 Residence (County) | Cumberland |
| Additional Details | |
| Occupation | laborer |
| Industry | iron works |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 251 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Occupation | Laborer |
| Township / Ward | Portland City |
| Est. Birth Year | ~1919 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Donahue | Daughter | — | 18 | ~1922 |
| Helen Donahue | Daughter | — | 16 | ~1924 |
| Redmond Donahue | Head | — | 51 | ~1889 |
| Edward Donahue | Son | — | 23 | ~1917 |
| Raymond Donahue | Son | — | 27 | ~1913 |
| John Donahue | Son | — | 21 | ~1919 |
| Lena Donahue | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Cumberland, Maine
Son, age 1
Cumberland, Maine · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donahue |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Cumberland, Maine
Son, age 11
Cumberland, Maine · implied b. ~1919 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donahue |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
Cumberland-County, Maine
Son, age 21
Cumberland-County, Maine · implied b. ~1919 — 7 household members
| Surname | Donahue |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maine |
| 1935 Residence (City) | Portland City |
| 1935 Residence (County) | Cumberland |
| Occupation | laborer |
| Industry | iron works |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 251 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Donahue across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Lena Donahue (~0.92 confidence) and mother Lena Donahue (~0.92 confidence) and father Redlon Donahue (~0.92 confidence) and father Redmond Donahue (~0.92 confidence) and father Edward Donahue (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Lena Donahue
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Lena Donahue
b. ~1886
Source mother
● Household
· direct · ~0.92
Father
Redlon Donahue
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Redmond Donahue
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Edward Donahue
b. ~1890
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Donahue
Son · 1940 · age 21 · b. ~1919 · Maine
★ You are viewing this record
Sibling
Mary Donahue
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Donahue
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Donahue
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Donahue
Sibling · 1940 · age 23
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 — Cumberland-County, Maine
Open full size
1940 US Federal Census — Cumberland-County, Maine
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01475-00395)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George X Carroll | 40 | Head | Laborer | England |
| 2 | Freda Carroll | 36 | Wife | — | Maine |
| 3 | Geary Mary Carroll | 16 | Daughter | — | Maine |
| 4 | Neil Dambrie | 65 | Head | — | Italy |
| 5 | Marie D Dambrie | 50 | Wife | — | Italy |
| 6 | Etilo Dambrie | 30 | Son | — | Maine |
| 7 | Ralph Dambrie | 28 | Son | Cab Driver | Maine |
| 8 | Alfred Romans | 31 | Head | Mechanic | Maine |
| 9 | Viola R Romans | 26 | Wife | Crane Operator | Italy |
| 10 | Rosalie Romans | 2 | Daughter | — | Maine |
| 11 | Charles Delphonse | 46 | Head | Laborer | Italy |
| 12 | Georgia S Delphonse | 45 | Wife | — | Italy |
| 13 | Samuel Delphonse | 18 | Son | — | Maine |
| 14 | Joseph Delphonse | 15 | Son | — | Maine |
| 15 | Mary Delphonse | 13 | Daughter | — | Maine |
| 16 | Nicholas Delphonse | 11 | Son | — | Maine |
| 17 | John Delphonse | 10 | Son | — | Maine |
| 18 | Theresa Delphonse | 7 | Daughter | — | Maine |
| 19 | Nunzi Delphonse | 7 | Son | — | Maine |
| 20 | Albert Johnson | 39 | Head | Foreman | Maine |
| 21 | Edel S Johnson | 36 | Wife | — | Maine |
| 22 | Emmons Johnson | 15 | Son | — | Maine |
| 23 | Everett Johnson | 11 | Son | — | Maine |
| 24 | Margaret Mcdonough | 32 | Head | — | Maine |
| 25 | John Mcdonough | 40 | Brother | — | Maine |
| 26 | Martin Mcdonough | 37 | Brother | Sub Carrier | Maine |
| 27 | Thomas Mcdonough | 34 | Brother | Laborer | Maine |
| 28 | Daniel Mcdonough | 29 | Brother | Laborer | Maine |
| 29 | — | None | — | Laborer | — |
| 30 | Redmond Donahue | 51 | Head | Laborer | Western Ireland |
| 31 | Lena D Donahue | 55 | Wife | — | Western Ireland |
| 32 | Raymond Donahue | 27 | Son | Laborer | Maine |
| 33 | Edward Donahue | 23 | Son | Laborer | Maine |
| 34 | John Donahue THIS PERSON | 21 | Son | Laborer | Maine |
| 35 | Mary Donahue | 18 | Daughter | Packer | Maine |
| 36 | Helen Donahue | 16 | Daughter | — | Maine |
| 37 | Thomas X Craven | 60 | Head | Salesman | Maine |
| 38 | Anna Craven | 60 | Wife | — | Maine |
| 39 | Grace Craven | 30 | Daughter | Nurse | Maine |
| 40 | John Craven | 19 | Son | — | Maine |
Pedigree Summary
John + 4 siblings
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)