WD
William Donnelly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this William Donnelly across the 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 8-person household.
Age 22
b. ~1918
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Donnelly |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Colwyn Borough |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Wire Inspector |
| Industry | Wire Mfg. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 750 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Wire Inspector |
| Township / Ward | Colwyn Borough |
| Est. Birth Year | ~1918 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Joseph Donnelly | Son | — | 19 | ~1921 |
| Dorothy Donnelly | Daughter | — | 18 | ~1922 |
| Elizabeth Donnelly | Spouse | — | 48 | ~1892 |
| Helen Donnelly | Other | — | 25 | ~1915 |
| Helen Donnelly | Daughter | — | 16 | ~1924 |
| William Donnelly | Son | — | 22 | ~1918 |
| Joseph Donnelly | Head | — | 50 | ~1890 |
| Mary Donnelly | Daughter | — | 23 | ~1917 |
Census Appearances
1930
Delaware, Pennsylvania
Son, age 11
Delaware, Pennsylvania · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelly |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Son, age 22
Delaware-County, Pennsylvania · implied b. ~1918 — 8 household members
| Surname | Donnelly |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Colwyn Borough |
| 1935 Residence (County) | Delaware |
| Occupation | Wire Inspector |
| Industry | Wire Mfg. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 750 |
| Highest Grade | Hs 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 William Donnelly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Donnelly
Son · 1940 · age 22 · b. ~1918 · Pennsylvania
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Sibling
Dorothy Donnelly
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Donnelly
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Donnelly
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Donnelly
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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03490-00451)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Virginia Bretherick | 14 | Daughter | — | Pennsylvania |
| 2 | Louden Bretherick | 11 | Son | — | Pennsylvania |
| 3 | Henry Bretherick | 8 | Son | — | Pennsylvania |
| 4 | Bernard Bretherick | 5 | Son | — | Pennsylvania |
| 5 | Walter W. Humphries | 46 | Head | Foreman | Pennsylvania |
| 6 | Alice A. Humphries | 45 | Wife | — | Pennsylvania |
| 7 | George A. Humphries | 19 | Son | Electrician | Pennsylvania |
| 8 | Joseph E. Humphries | 18 | Son | — | Pennsylvania |
| 9 | Helen Humphries | 15 | Daughter | — | Pennsylvania |
| 10 | Betty Humphries | 9 | Niece | — | Pennsylvania |
| 11 | Margaret Charles | 70 | Head | — | Ireland |
| 12 | William H. Charles | 47 | Son | Pressman | Ireland |
| 13 | Thomas Charles | 42 | Son | Electrician | Ireland |
| 14 | Margaret C. Finley | 30 | Daughter | — | Ireland |
| 15 | Robert J. Finley | 7 | Grandson | — | Pennsylvania |
| 16 | Mary E. O'Donnell | 60 | Head | — | Pennsylvania |
| 17 | Joseph R. Fillmore | 58 | Brother | — | Pennsylvania |
| 18 | Joseph Jr. Fillmore | 19 | Nephew | — | Pennsylvania |
| 19 | August G. Funk | 74 | Head | Proprietor | Germany |
| 20 | Caroline K. Funk | 67 | Wife | — | Germany |
| 21 | Joseph J. Donnelly | 50 | Head | Janitor | Maryland |
| 22 | Elizabeth M. Donnelly | 48 | Wife | — | Kansas |
| 23 | Mary E. Donnelly | 23 | Daughter | Secretary | Pennsylvania |
| 24 | Joseph J. Donnelly | 19 | Son | Accountant | Pennsylvania |
| 25 | Dorothy E. Donnelly | 18 | Daughter | Saleswoman | Pennsylvania |
| 26 | Helen M. Donnelly | 16 | Daughter | — | Pennsylvania |
| 27 | William J. Donnelly THIS PERSON | 22 | Son | Wire Inspector | Pennsylvania |
| 28 | Helen Donnelly | 25 | Daughter-in-law | Packer | Pennsylvania |
| 29 | Joseph P. Hopkins | 42 | Head | Electrician | Illinois |
| 30 | Margaret M. Hopkins | 29 | Wife | — | Pennsylvania |
| 31 | Joseph Jr. Hopkins | 20 | Son | Brickpointer | Pennsylvania |
| 32 | John F. Hopkins | 18 | Son | Brickpointer | Pennsylvania |
| 33 | Robert Jr. Hopkins | 21 | Son | Inspector | Pennsylvania |
| 34 | Helen M. Hopkins | 19 | Daughter | — | Pennsylvania |
| 35 | William R. Hopkins | 2 | Son | — | Pennsylvania |
| 36 | Charles F. Porter | 46 | Head | Laborer | Pennsylvania |
| 37 | Maud A. Porter | 57 | Wife | — | Pennsylvania |
| 38 | Charles F. Jr. Porter | 18 | Son | — | Pennsylvania |
| 39 | Luke A. Neary | 43 | Head | — | Pennsylvania |
| 40 | Eleanor R. Neary | 33 | Wife | — | 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)