RM
Robert Mcdonald — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cumberland, Maine
Our Model Tree links this Robert Mcdonald across the 1930 and 1940 US Censuses in Cumberland, Maine (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 11-person household.
Age 9
b. ~1921
Male
Son
Born: Maine
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cumberland, Maine |
| Surname | McDonald |
| Given Name | Robert B |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Canada English |
| Mother's Birthplace | New York |
| Additional Details | |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Township / Ward | Windham Town Part Of |
| Est. Birth Year | ~1921 |
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.
11 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Gladys Mcdonald | Daughter | — | 15 | ~1915 |
| Dorothy Mcdonald | Daughter | — | 20 | ~1910 |
| Betty Mcdonald | Daughter | — | 5 | ~1925 |
| Ruth Mcdonald | Daughter | — | 17 | ~1913 |
| Malcolm Mcdonald | Head | — | 50 | ~1880 |
| Donald Mcdonald | Son | — | 12 | ~1918 |
| Robert Mcdonald | Son | — | 9 | ~1921 |
| Richard Mcdonald | Son | — | 11 | ~1919 |
| Philip Mcdonald | Son | — | 2 | ~1928 |
| Kenneth Mcdonald | Son | — | 8 | ~1922 |
| Ida Mcdonald | Spouse | — | 43 | ~1887 |
Census Appearances
1930
Cumberland, Maine
Son, age 9
Cumberland, Maine · implied b. ~1921 — 11 household members
| Surname | McDonald |
| Given Name | Robert B |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Canada English |
| Mother's Birthplace | New York |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
Cumberland-County, Maine
Son, age 19
Cumberland-County, Maine · implied b. ~1921 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacDonald |
| Given Name | Robert M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maine |
| 1935 Residence (City) | South Portland City |
| 1935 Residence (County) | Cumberland |
| Occupation | Delivery-Truck Driver |
| Industry | Retail-Grocery-Store |
| Class of Worker | PW |
| Hours Worked | 55 |
| Income (1939) | 800 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Robert Mcdonald across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Mcdonald
Son · 1930 · age 9 · b. ~1921 · Maine
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Sibling
Richard Mcdonald
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Philip Mcdonald
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gladys Mcdonald
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Mcdonald
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Mcdonald
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Mcdonald
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Mcdonald
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Mcdonald
Sibling · 1930 · age 5
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 — Cumberland, Maine
Open full size
1930 US Federal Census — Cumberland, Maine
Page Contents
50 people indexed on this census page (ia:1930:15thcensus831unit:1124)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Ruth A Den | 84 | Head | Boarding House | Maine |
| 52 | Walter Den | 36 | Boarder | Teamster | Maine |
| 53 | Franklin T Libby | 30 | Head | Fireman | Maine |
| 54 | Viola Libby | 33 | Wife | — | New Hampshire |
| 55 | Everett E Ward | 25 | Head | Teamster | Maine |
| 56 | Isabelle L Ward | 24 | Wife | — | Maine |
| 57 | Joseph Arsenault | 41 | Boarder | Teamster | Canada English |
| 58 | Leon P L Arsenault | 27 | Head | Wood Chopper | Canada English |
| 59 | Lester Kimball | 37 | Head | Farmer | Maine |
| 60 | Dorothy M Kimball | 28 | Wife | — | Maine |
| 61 | Edward J Kimball | 2 | Son | — | Maine |
| 62 | Herbert L Kimball | 1 | Son | — | Maine |
| 63 | Benton S Parker | 72 | Head | Laborer | Maine |
| 64 | Malcolm J E Mcdonald | 50 | Head | Farmer | Canada English |
| 65 | Ida D Mcdonald | 43 | Wife | — | New York |
| 66 | Dorothy K Mcdonald | 20 | Daughter | — | Maine |
| 67 | Ruth E Mcdonald | 17 | Daughter | — | Maine |
| 68 | Gladys T Mcdonald | 15 | Daughter | — | Maine |
| 69 | Donald J Mcdonald | 12 | Son | — | Maine |
| 70 | Richard L Mcdonald | 11 | Son | — | Maine |
| 71 | Robert B Mcdonald THIS PERSON | 9 | Son | — | Maine |
| 72 | Kenneth S Mcdonald | 8 | Son | — | Maine |
| 73 | Betty J Mcdonald | 5 | Daughter | — | Maine |
| 74 | Philip E Mcdonald | 2 | Son | — | Maine |
| 75 | Sinclair Dundee | 57 | Head | Farmer | Canada English |
| 76 | Annie E Dundee | 52 | Wife | — | Canada English |
| 77 | Christy F Dundee | 24 | Daughter | — | Maine |
| 78 | Robert C Dundee | 18 | Son | — | Maine |
| 79 | Mary E Dundee | 14 | Daughter | — | Maine |
| 80 | John S Dundee | 11 | Son | — | Maine |
| 81 | Annie M Dundee | 8 | Daughter | — | Maine |
| 82 | Edith Dundee | 7 | Daughter | — | Maine |
| 83 | Charles S Vamey | 67 | Head | Laborer | Maine |
| 84 | Lucy J Vamey | 64 | Wife | — | Maine |
| 85 | Fred W Vamey | 36 | Son | Laborer | Maine |
| 86 | Charles H Merrill | 55 | Head | Carpenter | Maine |
| 87 | Katherine P Merrill | 64 | Wife | — | Maine |
| 88 | Walter M Cram | 70 | Head | Farmer | Maine |
| 89 | Huldah E Cram | 68 | Wife | — | Maine |
| 90 | Ralph L Kingham | 20 | Grandson | — | Maine |
| 91 | Stanley T Kingham | 17 | Grandson | — | Maine |
| 92 | Ruth B Kingham | 14 | Granddaughter | — | Maine |
| 93 | Herbert F Hill | 60 | Head | Laborer | Maine |
| 94 | Edith M Hill | 44 | Wife | — | Maine |
| 95 | Harry D Hill | 23 | Son | Laborer | Maine |
| 96 | Raymond S Hill | 18 | Son | — | Maine |
| 97 | Arthur M Black | 61 | Head | Laborer | Maine |
| 98 | Etta M King | 69 | Head | — | Maine |
| 99 | Willis R Libby | 42 | Nephew | — | Maine |
| 100 | Fred L Haskell | 64 | Head | Farmer | Maine |
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)