JM
James Mcdonald — 1930 US Census Record
Model Tree available1930 United States Federal Census · Ramsey, Minnesota
Our Model Tree links this James Mcdonald across the 1920, 1930 and 1940 US Censuses in Ramsey, Minnesota (XGBoost, ~Confirmed), with identified parents Robert & Mary — first a son (b.~1910), then head of a 6-person household.
Age 20
b. ~1910
Male
Son
Born: Minnesota
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Ramsey, Minnesota |
| Surname | McDonald |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | Auto Mechanic |
| Industry | Auto Repair Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Auto Mechanic |
| Township / Ward | St Paul City |
| Est. Birth Year | ~1910 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Gertrude Mcdonald | Daughter | — | 17 | ~1913 |
| Marjory Mcdonald | Daughter | — | 11 | ~1919 |
| Mae Mcdonald | Head | — | 42 | ~1888 |
| Lawrence Mcdonald | Son | — | 15 | ~1915 |
| James Mcdonald | Son | — | 20 | ~1910 |
| Owen Mcdonald | Son | — | 13 | ~1917 |
Census Appearances
1920
Ramsey, Minnesota
Son, age 10
Ramsey, Minnesota · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Donald |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Ramsey, Minnesota
Son, age 20
Ramsey, Minnesota · implied b. ~1910 — 6 household members
| Surname | McDonald |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Illinois |
| Occupation | Auto Mechanic |
| Industry | Auto Repair Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Ramsey-County, Minnesota
Head, age 30
Ramsey-County, Minnesota · implied b. ~1910 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Donald |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | St. Paul |
| 1935 Residence (County) | Ramsey |
| Occupation | Salesman |
| Industry | Wholesale |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | H-2 |
| 1935 Residence | Same Place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 James Mcdonald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Mc Donald (~0.92 confidence) and mother Mary Mc Donald (~0.92 confidence) and mother Mae Mcdonald (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Mc Donald
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Mary Mc Donald
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Mae Mcdonald
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Mcdonald
Son · 1930 · age 20 · b. ~1910 · Minnesota
★ You are viewing this record
Sibling
Gertrude Mcdonald
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Mcdonald
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marjory Mcdonald
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Owen Mcdonald
Sibling · 1930 · age 13
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 — Ramsey, Minnesota
Open full size
1930 US Federal Census — Ramsey, Minnesota
Page Contents
50 people indexed on this census page (ia:1930:minnesotacensus00reel1120:0228)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Mae Mcdonald | 42 | Head | — | Illinois |
| 52 | James Mcdonald THIS PERSON | 20 | Son | Auto Mechanic | Minnesota |
| 53 | Gertrude Mcdonald | 17 | Daughter | Housekeeper | Minnesota |
| 54 | Lawrence Mcdonald | 15 | Son | — | Minnesota |
| 55 | Owen Mcdonald | 13 | Son | — | Minnesota |
| 56 | Marjory Mcdonald | 11 | Daughter | — | Minnesota |
| 57 | Isaac Hynes | 66 | Head | — | Wisconsin |
| 58 | Hannah Hynes | 59 | Wife | — | Canada English |
| 59 | Alice E. Hynes | 23 | Daughter | Credit Clerk | Minnesota |
| 60 | Schafer | 38 | Head | Truck Driver | Minnesota |
| 61 | Lena Schafer | 36 | Wife | — | Minnesota |
| 62 | Herbert Schafer | 6 | Son | — | Minnesota |
| 63 | Martin J. Coyne | 31 | Head | Collector | Irish Free State |
| 64 | Mary A. Coyne | 28 | Wife | — | Minnesota |
| 65 | Martin A. Coyne | 2 | Son | — | Minnesota |
| 66 | Margaret O. Skaug | 34 | Daughter | — | Minnesota |
| 67 | — | None | — | — | — |
| 68 | — | None | — | — | — |
| 69 | — | None | — | — | — |
| 70 | — | None | — | — | — |
| 71 | — | None | — | — | — |
| 72 | — | None | — | — | — |
| 73 | — | None | — | — | — |
| 74 | — | None | — | — | — |
| 75 | — | None | — | — | — |
| 76 | — | None | — | — | — |
| 77 | — | None | — | — | — |
| 78 | — | None | — | — | — |
| 79 | — | None | — | — | — |
| 80 | — | None | — | — | — |
| 81 | — | None | — | — | — |
| 82 | — | None | — | — | — |
| 83 | — | None | — | — | — |
| 84 | — | None | — | — | — |
| 85 | — | None | — | — | — |
| 86 | — | None | — | — | — |
| 87 | — | None | — | — | — |
| 88 | — | None | — | — | — |
| 89 | — | None | — | — | — |
| 90 | — | None | — | — | — |
| 91 | — | None | — | — | — |
| 92 | — | None | — | — | — |
| 93 | — | None | — | — | — |
| 94 | — | None | — | — | — |
| 95 | — | None | — | — | — |
| 96 | — | None | — | — | — |
| 97 | — | None | — | — | — |
| 98 | — | None | — | — | — |
| 99 | — | None | — | — | — |
| 100 | — | None | — | — | — |
Pedigree Summary
James + 4 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)