WD
William Donnelly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this William Donnelly across the 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | Donnelly |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Additional Details | |
| Occupation | Salesman |
| Industry | Office Supplies |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Salesman |
| Township / Ward | Detroit City |
| Est. Birth Year | ~1917 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| William Donnelly | Head | — | 54 | ~1886 |
| Mary Donnelly | Daughter | — | 21 | ~1919 |
| John Donnelly | Son | — | 24 | ~1916 |
| Elizabeth Donnelly | Daughter | — | 26 | ~1914 |
| Elizabeth Donnelly | Spouse | — | 47 | ~1893 |
| William Donnelly | Son | — | 23 | ~1917 |
| Rhuanne Roberts | Other | — | 67 | ~1873 |
Census Appearances
1930
Wayne, Michigan
Son, age 12
Wayne, Michigan · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelly |
| Given Name | William M. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Wayne-County, Michigan
Son, age 23
Wayne-County, Michigan · implied b. ~1917 — 7 household members
| Surname | Donnelly |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Occupation | Salesman |
| Industry | Office Supplies |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 23 · b. ~1917 · Michigan
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Sibling
John Donnelly
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Donnelly
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Donnelly
Sibling · 1940 · age 26
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 — Wayne-County, Michigan
Open full size
1940 US Federal Census — Wayne-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01872-00119)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Suzanne Hughes | 11 | Daughter | — | Michigan |
| 2 | Robert Smith | 51 | Head | Order Clerk | Ohio |
| 3 | Ida M. Smith | 80 | Mother | — | Ohio |
| 4 | Howard Lee | 48 | Head | Salesman | Michigan |
| 5 | Mary L. Lee | 81 | Mother | — | Michigan |
| 6 | Emma Conway | 65 | Head | — | Wisconsin |
| 7 | Mary Hughes | 70 | Partner | — | Minnesota |
| 8 | Frank Marco | 55 | Head | Salesman | Michigan |
| 9 | Marion Marco | 55 | Wife | — | Michigan |
| 10 | Marion Marco | 18 | Daughter | Office Clerk | Michigan |
| 11 | Phillip Marco | 20 | Son | Salesman | Michigan |
| 12 | Rudolph Opperman | 68 | Head | Physician | Michigan |
| 13 | Isabelle Opperman | 66 | Wife | — | Canada English |
| 14 | Beulah Randel | 20 | Maid | Housework | Louisiana |
| 15 | William C. Eckley | 47 | Head | Superintendent | Pennsylvania |
| 16 | Ethelyn Eckley | 39 | Wife | — | Ohio |
| 17 | John Eckley | 23 | Son | — | Michigan |
| 18 | Frederick Ducharme | 75 | Head | — | Michigan |
| 19 | Caroline Ducharme | 71 | Wife | — | Michigan |
| 20 | Elsie Ducharme | 43 | Daughter | — | Michigan |
| 21 | Jessie Saunders | 59 | Servant | Maid | Scotland |
| 22 | Margaret Taylor | 58 | Cook | Cook | England |
| 23 | John Smith | 43 | Head | Chauffeur | Scotland |
| 24 | Margaret Smith | 43 | Wife | — | Scotland |
| 25 | Margaret Smith | 13 | Daughter | — | Canada English |
| 26 | Carlin R. Mabley | 60 | Head | District Sales Mgr | Michigan |
| 27 | Louise Mabley | 59 | Wife | — | Connecticut |
| 28 | Theodore Mabley | 27 | Son | Purchasing Agent | New York |
| 29 | Frank Mabley | 21 | Son | Lubricating Engineer | Connecticut |
| 30 | Lockey Phillip | 45 | Servant | Housemaid | Tennessee |
| 31 | William M. Donnelly | 54 | Head | Attorney | Michigan |
| 32 | Elizabeth Donnelly | 47 | Wife | District Supervisor | Maryland |
| 33 | Elizabeth Donnelly | 26 | Daughter | Book Clerk | Michigan |
| 34 | John C. Donnelly | 24 | Son | — | Michigan |
| 35 | William J. Donnelly THIS PERSON | 23 | Son | Salesman | Michigan |
| 36 | Mary Donnelly | 21 | Daughter | Mortgage Dept | Michigan |
| 37 | Rhuanne Roberts | 67 | Mother in law | — | Maryland |
| 38 | Albert S. Keen | 65 | Head | Owner | Michigan |
| 39 | Ethel Keen | 57 | Wife | — | Ohio |
| 40 | Anna Moyer | 64 | Housekeeper | Housekeeper | Michigan |
Related Census Records
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)