MJ
Margaret Johnston — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this Margaret Johnston across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents L & Cassell — first a daughter (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | Johnston |
| Given Name | Margaret E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | North Wales |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Law office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | No C-2 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Stenographer |
| Township / Ward | Franconia |
| 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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| William Johnston | Son | — | 24 | ~1916 |
| Helen Johnston | Spouse | — | 42 | ~1898 |
| Margaret Johnston | Daughter | — | 22 | ~1918 |
| J Johnston | Head | — | 45 | ~1895 |
Census Appearances
1920
Montgomery, Pennsylvania
Daughter, age 1
Montgomery, Pennsylvania · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Montgomery, Pennsylvania
Daughter, age 12
Montgomery, Pennsylvania · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Margaret E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Montgomery-County, Pennsylvania
Daughter, age 22
Montgomery-County, Pennsylvania · implied b. ~1918 — 4 household members
| Surname | Johnston |
| Given Name | Margaret E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | North Wales |
| 1935 Residence (County) | Montgomery |
| Occupation | Stenographer |
| Industry | Law office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | No C-2 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Margaret Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father L Johnston (~0.92 confidence) and father Cassell Johnston (~0.92 confidence) and mother Helen Johnston (~0.92 confidence) and father J Johnston (~0.92 confidence) and mother Helen Johnston (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
L Johnston
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Cassell Johnston
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Helen Johnston
b. ~1893
Source mother
● Household
· direct · ~0.92
Father
J Johnston
b. ~1895
Source father
● Household
· direct · ~0.92
Mother
Helen Johnston
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Johnston
Daughter · 1940 · age 22 · b. ~1918 · Pennsylvania
★ You are viewing this record
Sibling
William Johnston
Sibling · 1940 · age 24
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 — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03584-00631)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Allen C. Moyer | 72 | Head | Owner | Pennsylvania |
| 42 | Ella C. Moyer | 43 | Daughter | — | Pennsylvania |
| 43 | Allen C. Jr. Moyer | 40 | Head | Hired Hand | Pennsylvania |
| 44 | Amanda L. Moyer | 34 | Wife | — | Pennsylvania |
| 45 | Jay A. Moyer | 6 | Son | — | Pennsylvania |
| 46 | Ina L. Moyer | 3 | Daughter | — | Pennsylvania |
| 47 | Wilson D. Fretz | 57 | Head | Owner | Pennsylvania |
| 48 | Liza N. Fretz | 56 | Wife | — | Pennsylvania |
| 49 | Leroy K. Fretz | 17 | Son | — | Pennsylvania |
| 50 | Harold K. Fretz | 11 | Son | — | Pennsylvania |
| 51 | Willard K. Mcnulty | 26 | Head | Boarder | Pennsylvania |
| 52 | Leona H. Mcnulty | 24 | Wife | — | Pennsylvania |
| 53 | Cynthia B. Mcnulty | 5 | Daughter | — | Pennsylvania |
| 54 | Willard B. Mcnulty | 4 | Son | — | Pennsylvania |
| 55 | William F. Delf | 44 | Head | Owner | Pennsylvania |
| 56 | Emma L. Delf | 37 | Wife | — | Pennsylvania |
| 57 | William C. Delf | 15 | Son | — | Pennsylvania |
| 58 | Liza M. Delf | 74 | Mother | — | Pennsylvania |
| 59 | Abraham D. Giegler | 43 | Head | Painter | Pennsylvania |
| 60 | Esther F. Giegler | 41 | Wife | — | Pennsylvania |
| 61 | Edith D. Giegler | 18 | Daughter | Bookkeeper | Pennsylvania |
| 62 | Alma D. Giegler | 14 | Daughter | — | Pennsylvania |
| 63 | Abraham D. Jr. Giegler | 11 | Son | — | Pennsylvania |
| 64 | Lois E. Giegler | 10 | Daughter | — | Pennsylvania |
| 65 | A. L. Detweiler | 20 | Head | Laborer | Pennsylvania |
| 66 | Sofia W. Detweiler | 67 | Wife | — | Pennsylvania |
| 67 | Henry H. Detweiler | 32 | Son | Sprayer | Pennsylvania |
| 68 | Ada H. Detweiler | 25 | Daughter | Examiner | Pennsylvania |
| 69 | Margaret H. Detweiler | 21 | Daughter | Examiner | Pennsylvania |
| 70 | Ellery Kramer | 46 | Head | Transfer | Pennsylvania |
| 71 | Pearl D. Kramer | 18 | Daughter | Examining | Pennsylvania |
| 72 | Florence D. Kramer | 15 | Daughter | — | Pennsylvania |
| 73 | Abraham D. Kramer | 12 | Son | — | Pennsylvania |
| 74 | Harrison D. Yerger | 24 | Son-in-law | Bookkeeper | Pennsylvania |
| 75 | Anna M. Yerger | 21 | Daughter | — | Pennsylvania |
| 76 | Ruth A. Yerger | 0 | Grand-daughter | — | Pennsylvania |
| 77 | J. Claude Johnston | 45 | Head | Owner | Pennsylvania |
| 78 | Helen L. Johnston | 42 | Wife | — | Pennsylvania |
| 79 | William H. Johnston | 24 | Son | Asst. Gen. Manager | Pennsylvania |
| 80 | Margaret E. Johnston THIS PERSON | 22 | Daughter | Stenographer | Pennsylvania |
Pedigree Summary
Margaret + 1 sibling
Gen 1 · 5 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)