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John Mcmillan — 1920 US Census Record
Model Tree available1920 United States Federal Census · Mercer, New Jersey
Our Model Tree links this John Mcmillan across the 1920, 1930 and 1940 US Censuses in Mercer, New Jersey (XGBoost, ~Confirmed), with identified parents James & Margaret — first a son (b.~1903), then head of a 8-person household.
Age 17
b. ~1903
Male
Son
Born: Scotland
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Mercer, New Jersey |
| Surname | McMillan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1905 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Additional Details | |
| Occupation | Tool Maker |
| Industry | Elastic Mfg |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Year of Naturalization | 1915 |
| Birthplace (normalized) | scotland |
| Occupation | Tool Maker |
| Township / Ward | Hamilton Township |
| Est. Birth Year | ~1903 |
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 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcmillan | Daughter | — | 9 | ~1911 |
| Elizabeth Mcmillan | Daughter | — | 17 | ~1903 |
| Margaret Mcmillan | Spouse | — | 45 | ~1875 |
| Jean Mcmillan | Daughter | — | 22 | ~1898 |
| James Mcmillan | Son | — | 12 | ~1908 |
| Gertrude Mcmillan | Daughter | — | 6 | ~1914 |
| James Mcmillan | Head | — | 47 | ~1873 |
| John Mcmillan | Son | — | 17 | ~1903 |
Census Appearances
1920
Mercer, New …
Son, age 17
Mercer, New Jersey · implied b. ~1903 — 8 household members
| Surname | McMillan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1905 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Tool Maker |
| Industry | Elastic Mfg |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Year of Naturalization | 1915 |
| Birthplace (normalized) | scotland |
1930
Mercer, New …
Son, age 27
Mercer, New Jersey · implied b. ~1903 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Macmillan |
| Given Name | John C |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1905 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | P.O. Clerk|P.O. Clerk |
| Industry | Machine Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Mercer-County, New …
Head, age 37
Mercer-County, New Jersey · implied b. ~1903 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacMullen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Naturalization Status | Naturalized |
| Occupation | Tool maker |
| Industry | Rubber mill |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Mcmillan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Mcmillan (~0.92 confidence) and mother Margaret Mcmillan (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mcmillan
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Margaret Mcmillan
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mcmillan
Son · 1920 · age 17 · b. ~1903 · New Jersey
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Sibling
Elizabeth Mcmillan
Sibling · 1920 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Mcmillan
Sibling · 1920 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcmillan
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcmillan
Sibling · 1920 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Mcmillan
Sibling · 1920 · age 6
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
1920 US Federal Census — Mercer, New Jersey
Open full size
1920 US Federal Census — Mercer, New Jersey
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1053unit:0356)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Fred Ida | 22 | Head | — | New Jersey |
| 52 | Florence Ida | 1 | Daughter | — | New Jersey |
| 53 | Nelson Barthold | 34 | Boarder | Helper | New Jersey |
| 54 | Andrew Dombroski | 26 | Head | Iron Maker | New Jersey |
| 55 | Elizabeth Dombroski | 23 | Wife | — | New Jersey |
| 56 | Lillian Dombroski | 2 | Daughter | — | New Jersey |
| 57 | Thomas Whittaker | 19 | Brother-in-law | Laborer | New Jersey |
| 58 | Hazel Whittaker | 17 | Sister-in-law | — | New Jersey |
| 59 | John Carlson | 60 | Head | Carpenter | Sweden |
| 60 | Lizzie Carlson | 56 | Wife | — | Delaware |
| 61 | Henry Carlson | 30 | Son | Carpenter | New Jersey |
| 62 | Adam Hyde | 54 | Head | Collector | New Jersey |
| 63 | Esther Hyde | 51 | Wife | — | New Jersey |
| 64 | Edith Hyde | 25 | Daughter | Cashier | New Jersey |
| 65 | Clifford Hyde | 22 | Son | Electrician | New Jersey |
| 66 | Mabel Hyde | 20 | Daughter | — | New Jersey |
| 67 | Ruth Hyde | 17 | Daughter | Bookkeeper | New Jersey |
| 68 | Randolph Hyde | 16 | Son | Stenographer | New Jersey |
| 69 | Walter Hyde | 12 | Son | — | New Jersey |
| 70 | Martha Hyde | 10 | Daughter | — | New Jersey |
| 71 | Bessie Hyde | 6 | Daughter | — | New Jersey |
| 72 | Stephen Hegedus | 46 | Head | Painter | Hungary |
| 73 | Bertha Hegedus | 41 | Wife | — | Hungary |
| 74 | Thelma Clara Hegedus | 11 | Daughter | — | New Jersey |
| 75 | Patrick Malory | 45 | Head | Contractor | Ireland |
| 76 | Elizabeth Malory | 45 | Wife | — | Pennsylvania |
| 77 | Margaret Malory | 26 | Daughter | Stenographer | New Jersey |
| 78 | Edward Malory | 25 | Son | Checker | New Jersey |
| 79 | Patrick Malory | 23 | Son | Checker | New Jersey |
| 80 | Thomas Malory | 13 | Son | — | New Jersey |
| 81 | Phillip Malory | 10 | Son | — | New Jersey |
| 82 | Joseph Kmiecik | 40 | Head | Sanitary | Poland |
| 83 | Mary Kmiecik | 34 | Wife | — | Poland |
| 84 | Stephen Kmiecik | 14 | Son | — | New Jersey |
| 85 | Frank Kmiecik | 13 | Son | — | New Jersey |
| 86 | Andrew Kmiecik | 12 | Son | — | New Jersey |
| 87 | Joseph Kmiecik | 10 | Son | — | New Jersey |
| 88 | Antoinette Kmiecik | 9 | Daughter | — | New Jersey |
| 89 | James Mcmillan | 47 | Head | Brass Finisher | Scotland |
| 90 | Margaret Mcmillan | 45 | Wife | — | Scotland |
| 91 | Jean Mcmillan | 22 | Daughter | Foreman | Scotland |
| 92 | Elizabeth Mcmillan | 17 | Daughter | Stenographer | Scotland |
| 93 | John Mcmillan THIS PERSON | 17 | Son | Tool Maker | Scotland |
| 94 | James Mcmillan | 12 | Son | — | Pennsylvania |
| 95 | Margaret Mcmillan | 9 | Daughter | — | New Jersey |
| 96 | Gertrude Mcmillan | 6 | Daughter | — | New Jersey |
| 97 | David Cooke | 37 | Head | Handley | Scotland |
| 98 | Jane Cooke | 37 | Wife | — | Scotland |
| 99 | David Cooke | 12 | Son | — | New Jersey |
| 100 | James Cooke | 10 | Son | — | New Jersey |
Pedigree Summary
John + 5 siblings
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)