JM
John Mcnamara — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Wayne, Michigan
Our Model Tree links this John Mcnamara across the 1930 and 1940 US Censuses in Wayne, Michigan (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 9-person household.
Age 11
b. ~1919
Male
Son
Born: Michigan
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Wayne, Michigan |
| Surname | McNamara |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Detroit 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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Marian Mcnamara | Daughter | — | 17 | ~1913 |
| Dorothy Mcnamara | Daughter | — | 15 | ~1915 |
| John Mcnamara | Head | — | 40 | ~1890 |
| James Mcnamara | Son | — | 7 | ~1923 |
| Robert Mcnamara | Son | — | 9 | ~1921 |
| John Mcnamara | Son | — | 11 | ~1919 |
| Richard Mcnamara | Son | — | 3 | ~1927 |
| Paul Mcnamara | Son | — | 5 | ~1925 |
| Frances Mcnamara | Spouse | — | 39 | ~1891 |
Census Appearances
1930
Wayne, Michigan
Son, age 11
Wayne, Michigan · implied b. ~1919 — 9 household members
| Surname | McNamara |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Wayne-County, Michigan
Son, age 20
Wayne-County, Michigan · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacNamara |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Detroit city |
| 1935 Residence (County) | Wayne |
| Occupation | Chauffeur |
| Industry | Private family |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 1350 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 John Mcnamara across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mcnamara
Son · 1930 · age 11 · b. ~1919 · Michigan
★ You are viewing this record
Sibling
Paul Mcnamara
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marian Mcnamara
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Mcnamara
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcnamara
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcnamara
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Mcnamara
Sibling · 1930 · age 3
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
1930 US Federal Census — Wayne, Michigan
Open full size
1930 US Federal Census — Wayne, Michigan
Page Contents
29 people indexed on this census page (ia:1930:michigancensus00reel1054:1177)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lovel M Muir | 40 | Head | Salesman | Michigan |
| 2 | Lillian Muir | 31 | Wife | Service Taker | Minnesota |
| 3 | Jeanette Muir | 67 | Mother | — | New York |
| 4 | Elizabeth Juca | 60 | Head | — | New York |
| 5 | Finley H Juca | 32 | Son | Salesman | Indiana |
| 6 | Alice Juca | 28 | Daughter | — | Michigan |
| 7 | Thomas Juca | 24 | Son | — | Florida |
| 8 | John Vranish | 42 | Head | Floor Manager | Lithuania |
| 9 | Rose Vranish | 39 | Wife | — | Lithuania |
| 10 | George Vranish | 16 | Son | — | Michigan |
| 11 | Leonore Vranish | 14 | Daughter | — | Michigan |
| 12 | John Mcbride | 61 | Head | Traveler | Ohio |
| 13 | Margaret Mcbride | 59 | Wife | — | Ohio |
| 14 | Mary Mcbride | 39 | Daughter | — | Ohio |
| 15 | John Mcbride | 25 | Son | — | Michigan |
| 16 | James Guthrie | 50 | Head | Toolmaker | England |
| 17 | Alice Guthrie | 50 | Wife | — | Canada-English |
| 18 | James Guthrie | 17 | Son | Machinist | England |
| 19 | William Guthrie | 15 | Son | Apprentice | Canada-English |
| 20 | John Mcnamara | 40 | Head | Inspector | Michigan |
| 21 | Frances Mcnamara | 39 | Wife | — | Michigan |
| 22 | Marian Mcnamara | 17 | Daughter | Typist | Michigan |
| 23 | Dorothy Mcnamara | 15 | Daughter | — | Michigan |
| 24 | John Mcnamara THIS PERSON | 11 | Son | — | Michigan |
| 25 | Robert Mcnamara | 9 | Son | — | Michigan |
| 26 | James Mcnamara | 7 | Son | — | Michigan |
| 27 | Paul Mcnamara | 5 | Son | — | Michigan |
| 28 | Richard Mcnamara | 3 | Son | — | Michigan |
| 29 | — | None | — | — | — |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)