MA
Mary Anderson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Mary Anderson across the 1920, 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed), with identified parents James & James — first a daughter (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Anderson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Frederick City |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Frederick City |
| Est. Birth Year | ~1918 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Anderson | Daughter | — | 22 | ~1918 |
| James Anderson | Head | — | 52 | ~1888 |
| Woodrow Anderson | Son | — | 26 | ~1914 |
| Daisy Anderson | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Frederick, Maryland
Daughter, age 1
Frederick, Maryland · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Frederick, Maryland
Daughter, age 12
Frederick, Maryland · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Daughter, age 22
Frederick-County, Maryland · implied b. ~1918 — 4 household members
| Surname | Anderson |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Frederick City |
| 1935 Residence (County) | Frederick |
| Highest Grade | Hs 3 |
| 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 Anderson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Anderson (~0.92 confidence) and father James Anderson (~0.92 confidence) and father James Anderson (~0.92 confidence) and mother Daisy Anderson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Anderson
b. ~1888
Source father
● Household
· direct · ~0.92
Father
James Anderson
b. ~1889
Source father
● Household
· direct · ~0.92
Father
James Anderson
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Daisy Anderson
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Anderson
Daughter · 1940 · age 22 · b. ~1918 · Maryland
★ You are viewing this record
Sibling
Woodrow Anderson
Sibling · 1940 · age 26
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
1940 US Federal Census — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01548-00122)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Nannie Neff | 72 | Head | — | Maryland |
| 2 | Fannie Andreas | 77 | Sister | — | Maryland |
| 3 | Allen Brumney | 59 | Lodger | — | Maryland |
| 4 | George M. Peters | 32 | Head | — | Maryland |
| 5 | Minnie D. Peters | 28 | Wife | — | Maryland |
| 6 | Emily F. Best | 54 | Lodger | — | Maryland |
| 7 | Florence Jackson | 65 | Head | — | Ohio |
| 8 | Ethel Jackson | 60 | Wife | — | Indiana |
| 9 | Ellis B. Jacobs | 52 | Head | Mechanic | Illinois |
| 10 | Goldie J. Jacobs | 47 | Wife | — | Maryland |
| 11 | Henry F. Mcbride | 48 | Head | Mechanic | Maryland |
| 12 | Beulah Mcbride | 42 | Wife | — | Maryland |
| 13 | Mildred Mcbride | 18 | Daughter | Stenographer | Maryland |
| 14 | Betty Mcbride | 17 | Daughter | Clerk | Maryland |
| 15 | Charles F. Gilbert | 40 | Head | Salesman | Maryland |
| 16 | Ira I. Gilbert | 39 | Wife | — | Maryland |
| 17 | Gloria Gilbert | 12 | Daughter | — | Maryland |
| 18 | Charles Gilbert | 10 | Son | — | Maryland |
| 19 | Thomas Granville | 78 | Head | — | Maryland |
| 20 | Mary F. Granville | 76 | Wife | — | Maryland |
| 21 | James W. Anderson | 52 | Head | Car Inspector | Maryland |
| 22 | Daisy Anderson | 47 | Wife | — | Maryland |
| 23 | Mary E. Anderson THIS PERSON | 22 | Daughter | — | Maryland |
| 24 | Woodrow H. Anderson | 26 | Son | Paper Hanger | Maryland |
| 25 | Ray S. Eagle | 51 | Head | Janitor | Maryland |
| 26 | Blanche B. Eagle | 48 | Wife | — | Maryland |
| 27 | Miriam Eagle | 23 | Daughter | Nursemaid | Maryland |
| 28 | Rachel Eagle | 20 | Daughter | Seamstress | Maryland |
| 29 | Mary Jane Eagle | 16 | Daughter | — | Maryland |
| 30 | Michele Bopst | 49 | Head | Fire-Maker | Maryland |
| 31 | Frank Bopst | 41 | Brother | Truck Driver | Maryland |
| 32 | Martin Mauck | 41 | Head | Mechanic | Virginia |
| 33 | Alice Mauck | 34 | Wife | — | Maryland |
| 34 | Richard Mauck | 9 | Son | — | Maryland |
| 35 | Carrie King | 64 | Mother-in-law | — | Maryland |
| 36 | Patrick Moore | 26 | Head | Brick Maker | Maryland |
| 37 | Mary Moore | 24 | Wife | — | West Virginia |
| 38 | Nancy Lee Moore | 4 | Daughter | — | Maryland |
| 39 | Patrick Moore | 2 | Son | — | Maryland |
| 40 | Russell Tyson | 31 | Head | Truck Driver | Maryland |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)