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Mary Moon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Moon across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1901), then head of a 10-person household.
Age 39
b. ~1901
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Moon |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Industry | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1901 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Frank Moon | Head | — | 44 | ~1896 |
| Fania Moon | Daughter | — | 15 | ~1925 |
| Helen Moon | Daughter | — | 16 | ~1924 |
| Clemencia Moon | Daughter | — | 19 | ~1921 |
| Barbara Moon | Daughter | — | 4 | ~1936 |
| William Moore | Son | — | 1 | ~1939 |
| Mary Moon | Spouse | — | 39 | ~1901 |
| Martin Feeheley | Other | — | 67 | ~1873 |
| Earl Moon | Son | — | 20 | ~1920 |
| Patsy Moon | Daughter | — | 7 | ~1933 |
Census Appearances
1930
Baltimore, Maryland
Other, age 28
Baltimore, Maryland · implied b. ~1902 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Moan |
| Given Name | Mary B |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 27 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Spouse, age 39
Baltimore-City-County, Maryland · implied b. ~1901 — 10 household members
| Surname | Moon |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Industry | 0 |
| Highest Grade | H-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 Moon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Moon
Spouse · 1940 · age 39 · b. ~1901 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01534-00080)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Constance Defibaugh | 30 | Wife | — | Maryland |
| 42 | Ruth C Defibaugh | 7 | Daughter | — | Maryland |
| 43 | Amey Kielholtz | 59 | Head | Piano Tuner | Maryland |
| 44 | Howard Kielholtz | 55 | Brother | — | Maryland |
| 45 | John G Raum | 56 | Head | Night Watchman | Maryland |
| 46 | Lucy Raum | 51 | Wife | — | Maryland |
| 47 | John H Raum | 20 | Son | Sheet Metal | Maryland |
| 48 | Evelyn Raum | 12 | Daughter | — | Maryland |
| 49 | Charles Exter | 30 | Head | Warehouseman | Maryland |
| 50 | Lillian Exter | 25 | Wife | — | Maryland |
| 51 | Albert Willis | 51 | Head | Welder | Maryland |
| 52 | Evelyn Willis | 49 | Wife | — | Maryland |
| 53 | Carey Willis | 12 | Son | — | Maryland |
| 54 | Frank E Moon | 44 | Head | Proprietor | Ohio |
| 55 | Mary Moon THIS PERSON | 39 | Wife | — | Maryland |
| 56 | Earl Moon | 20 | Son | Counterman | Maryland |
| 57 | Helen Moon | 16 | Daughter | — | Maryland |
| 58 | Fania Moon | 15 | Daughter | — | Maryland |
| 59 | Patsy Moon | 7 | Daughter | — | Maryland |
| 60 | Barbara Moon | 4 | Daughter | — | Maryland |
| 61 | Clemencia Moon | 19 | Daughter | — | Maryland |
| 62 | Martin Feeheley | 67 | Father | — | Maryland |
| 63 | William Moore | 1 | Son | — | Maryland |
| 65 | Howard Stephens | 30 | Head | Inspector | Maryland |
| 66 | Charlotte Stephens | 25 | Wife | — | Maryland |
| 67 | Elaine Stephens | 4 | Daughter | — | Maryland |
| 68 | Howard B Stephens | 1 | Son | — | Maryland |
| 69 | Mary Holt | 46 | Head | — | Maryland |
| 70 | John R Holt | 17 | Son | Helper | Maryland |
| 71 | Clifton C Holt | 12 | Son | — | Maryland |
| 72 | George W Holt | 10 | Son | — | Maryland |
| 73 | Olivia W. Jones | 52 | Wife | Bookkeeper | Maryland |
| 74 | William E Jones | 42 | Head | Sheet Metal | Maryland |
| 75 | Louie Davis | 80 | Mother | — | Maryland |
| 76 | Charles M Davis | 50 | Brother | — | Maryland |
| 77 | Dennis J. Lanahan | 53 | Head | Electric Engineer | Maryland |
| 78 | Florence M. Lanahan | 52 | Wife | — | New York |
| 79 | Ella E. Lanahan | 23 | Daughter | — | Maryland |
| 80 | Charles E Lanahan | 21 | Son | Electrician | Maryland |
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)