MS
Mary Simpson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Frederick, Maryland
Our Model Tree links this Mary Simpson across the 1920, 1930 and 1940 US Censuses in Frederick, Maryland (XGBoost, ~Confirmed) — first a head (b.~1867), then head of a 2-person household.
Age 63
b. ~1867
Female
Head
Born: Maryland
Widowed
1930 Census Record Details
| Census Year | 1930 |
| Location | Frederick, Maryland |
| Surname | Simpson |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| Age at First Marriage | 20 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 35.00 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Frederick City Part Of |
| Est. Birth Year | ~1867 |
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.
2 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Simpson | Head | — | 63 | ~1867 |
| Victor Simpson | Son | — | 24 | ~1906 |
Census Appearances
1920
Frederick, Maryland
Head, age 52
Frederick, Maryland · implied b. ~1868 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Frederick, Maryland
Head, age 63
Frederick, Maryland · implied b. ~1867 — 2 household members
| Surname | Simpson |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| Age at First Marriage | 20 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 35.00 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Head, age 74
Frederick-County, Maryland · implied b. ~1866 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Maggie R. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District #9 |
| 1935 Residence (County) | Frederick |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Mary Simpson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Simpson
Head · 1930 · age 63 · b. ~1867 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Frederick, Maryland
Open full size
1930 US Federal Census — Frederick, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus874unit:0191)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Mattie Duesing | 55 | Head | Seamstress | Maryland |
| 52 | Helen Duesing | 18 | Daughter | Saleslady | Maryland |
| 53 | Eyler Mary Duesing | 38 | Daughter | Saleslady | Maryland |
| 54 | Phleeger Laura Duesing | 73 | Daughter | — | Maryland |
| 55 | William Mayhugh | 52 | Head | Laborer | Maryland |
| 56 | Ella Mayhugh | 75 | Mother | — | Maryland |
| 57 | Mary Mayhugh | 20 | Daughter | Knitter | Maryland |
| 58 | Ethel Young | 24 | Daughter | — | Maryland |
| 59 | Betty Young | 3 | Granddaughter | — | Maryland |
| 60 | Albert Schuler | 61 | Head | Owner | Switzerland |
| 61 | Anna Schuler | 51 | Wife | — | Germany |
| 62 | Henry Schuler | 21 | Son | Assistant | Maryland |
| 63 | Gretchen Schuler | 9 | Daughter | — | Maryland |
| 64 | Julia Young | 65 | Head | Teacher | Maryland |
| 65 | Margaret Young | 59 | Sister | — | Maryland |
| 66 | John Young | 50 | Brother | Painter | Maryland |
| 67 | Daniel Haff | 72 | Head | Carpenter | Maryland |
| 68 | Bessie Haff | 32 | Daughter | — | Maryland |
| 69 | Earl Roelke | 35 | Head | Owner | Pennsylvania |
| 70 | Gertrude Roelke | 30 | Wife | — | Maryland |
| 71 | Earl Jr. Roelke | 12 | Son | — | Maryland |
| 72 | Nadine Roelke | 8 | Daughter | — | Maryland |
| 73 | Austin Hoke | 22 | Head | Finisher | Maryland |
| 74 | Ruth Hoke | 23 | Wife | — | Maryland |
| 75 | Bernard Rader | 57 | Head | Manager | Maryland |
| 76 | Blanche Rader | 57 | Wife | — | England |
| 77 | Bernard S. Rader | 21 | Son | — | Maryland |
| 78 | Dorothy Rader | 19 | Daughter | Secretarial | Maryland |
| 79 | Grace Rader | 17 | Daughter | — | Maryland |
| 80 | Mary Simpson THIS PERSON | 63 | Head | — | Maryland |
| 81 | Victor Simpson | 24 | Son | Manager | Maryland |
| 82 | Jacob Gorman | 50 | Head | — | Maryland |
| 83 | Ida Gorman | 42 | Wife | — | Maryland |
| 84 | Ivanogle Catherine Gorman | 84 | Mother-in-law | — | Maryland |
| 85 | Emma Miller | 70 | Head | — | Maryland |
| 86 | Leon Miller | 15 | Grandson | — | Maryland |
| 87 | George Huffmaster | 47 | Head | Machinist | West Virginia |
| 88 | Margaret Huffmaster | 44 | Wife | — | Maryland |
| 89 | Charles Huffmaster | 23 | Son | Machinist | Maryland |
| 90 | Harry Marman | 49 | Head | Baggage Master | Maryland |
| 91 | Mollie Marman | 47 | Wife | — | Maryland |
| 92 | Charles Marman | 18 | Son | Laborer | Maryland |
| 93 | Louis Marman | 16 | Son | Helper | Maryland |
| 94 | Russell Koontz | 24 | Head | Machinist | Maryland |
| 95 | Katharine Koontz | 21 | Wife | — | Maryland |
| 96 | Russell Jr. Koontz | 0 | Son | — | Maryland |
| 97 | Elizabeth Koontz | 54 | Mother | — | Maryland |
| 98 | Florence Foster | 56 | Boarder | Inspector | Maryland |
| 99 | Granville Michael | 71 | Boarder | — | Maryland |
| 100 | Elmer Stup | 67 | Boarder | Foreman | Maryland |
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)