GJ
Gertrude Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Gertrude Johnson across the 1920, 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1883), then head of a 6-person household.
Age 57
b. ~1883
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Johnson |
| Given Name | Gertrude G |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Fountain Mills Road Election District 9 |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 6 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Fountain Mills Road Election District 9 |
| Est. Birth Year | ~1883 |
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 1940 census.
| Name | Relation to head | Relative to Gertrude | Age | Birth yr |
|---|---|---|---|---|
| Alma Mason | Daughter | — | 22 | ~1918 |
| Nathan Johnson | Head | — | 67 | ~1873 |
| James Mason | Other | — | 5 | ~1935 |
| Sherman Mason | Son | — | 31 | ~1909 |
| Ralph Johnson | Son | — | 12 | ~1928 |
| Gertrude Johnson | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Frederick, Maryland
Spouse, age 36
Frederick, Maryland · implied b. ~1884 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Gertrude |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | Black |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Frederick, Maryland
Other, age 46
Frederick, Maryland · implied b. ~1884 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Gertrude G. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| 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
Spouse, age 57
Frederick-County, Maryland · implied b. ~1883 — 6 household members
| Surname | Johnson |
| Given Name | Gertrude G |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Fountain Mills Road Election District 9 |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 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 Gertrude Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Gertrude Johnson
Spouse · 1940 · age 57 · b. ~1883 · Maryland
★ You are viewing this record
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-t0627-01549-00091)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clinton B Sewell | 55 | Head | Laborer | Maryland |
| 42 | Agnes E Sewell | 41 | Wife | — | Maryland |
| 43 | Mary B Brown | 20 | Daughter | — | Maryland |
| 44 | John W Brown | 23 | Son | Laborer | Maryland |
| 45 | Clinton Jr Sewell | 12 | Son | — | Maryland |
| 46 | Nathan Johnson | 67 | Head | Laborer | Maryland |
| 47 | Gertrude G Johnson THIS PERSON | 57 | Wife | — | Maryland |
| 48 | Sherman Mason | 31 | Son | Laborer | Maryland |
| 49 | Alma L Mason | 22 | Daughter | House Maid | Maryland |
| 50 | Ralph E Johnson | 12 | Son | — | Maryland |
| 51 | James L Mason | 5 | Grandson | — | Maryland |
| 52 | William E Hendrickson | 76 | Head | Carpenter | Maryland |
| 53 | Mary H Trout | 45 | Daughter | — | Maryland |
| 54 | Evan J Lawson | 53 | Head | Farmer | Maryland |
| 55 | Ethel A. S. Lawson | 43 | Wife | — | Maryland |
| 56 | Arthur S Lawson | 27 | Son | — | Maryland |
| 57 | Stanford A Lawson | 18 | Son | — | Maryland |
| 58 | Edgar W Davis | 56 | Head | Farmer | Maryland |
| 59 | Maude E Davis | 53 | Wife | — | Maryland |
| 60 | James W Davis | 19 | Son | — | Maryland |
| 61 | E Louise Davis | 16 | Daughter | — | Maryland |
| 62 | Betty J Davis | 14 | Daughter | — | Maryland |
| 63 | Nicholas S Ritter | 36 | Head | Laborer | Maryland |
| 64 | Helen A Ritter | 22 | Wife | — | Virginia |
| 65 | Lloyd Bugg | 40 | Head | W. P. A. Laborer | Kentucky |
| 66 | Myrtle Bugg | 35 | Wife | Seamstress | Kentucky |
| 67 | Robert L Bugg | 6 | Son | — | Kentucky |
| 68 | Lora Bugg | 74 | Mother | — | Kentucky |
| 69 | Aubrey G Davis | 45 | Head | Farmer | Maryland |
| 70 | Ursula B Davis | 44 | Wife | — | W Virginia |
| 71 | Audrey G Davis | 15 | Daughter | — | Maryland |
| 72 | Joseph P Werner | 2 | Grandson | — | Wash DC |
| 73 | Caroline Monroe | 80 | Head | — | Maryland |
| 74 | William T Monroe | 49 | Son | — | Maryland |
| 75 | Sterling S Monroe | 38 | Son | Laborer | Maryland |
| 76 | Walter W Thompson | 18 | Grandson | Laborer | Maryland |
| 77 | Hazel V Thompson | 15 | Granddaughter | — | Maryland |
| 78 | George E Thompson | 13 | Grandson | — | Maryland |
| 79 | Caroline F Thompson | 9 | Granddaughter | — | Maryland |
| 80 | Edith M Geigler | 14 | Granddaughter | — | 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)