RM
Robert Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lehigh-County, Pennsylvania
Our Model Tree links this Robert Martin across the 1920, 1930 and 1940 US Censuses in Lehigh-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents E & Fred — first a son (b.~1918), then head of a 2-person household.
Age 22
b. ~1918
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lehigh-County, Pennsylvania |
| Surname | Martin |
| Given Name | Robert M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (County) | Lehigh |
| Additional Details | |
| Occupation | Garage |
| Industry | Gas Station |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 151 |
| Highest Grade | 8 |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Garage |
| Township / Ward | Macungie Township |
| 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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| E Bond | Head | — | 77 | ~1863 |
| Robert Martin | Son | — | 22 | ~1918 |
Census Appearances
1920
Lehigh, Pennsylvania
Son, age 2
Lehigh, Pennsylvania · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Robert S. (St. Christ) |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | New Jersey |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Lehigh, Pennsylvania
Son, age 12
Lehigh, Pennsylvania · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Robert J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Lehigh-County, Pennsylvania
Son, age 22
Lehigh-County, Pennsylvania · implied b. ~1918 — 2 household members
| Surname | Martin |
| Given Name | Robert M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (County) | Lehigh |
| Occupation | Garage |
| Industry | Gas Station |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 151 |
| Highest Grade | 8 |
| 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 Robert Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father E Bond (~0.92 confidence) and father Fred Martin (~0.92 confidence) and father James Martin (~0.92 confidence) and mother Helen Martin (~0.92 confidence) and mother Carrie Martin (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
E Bond
b. ~1863
Source father
● Household
· direct · ~0.92
Father
Fred Martin
b. ~1894
Source father
● Household
· direct · ~0.92
Father
James Martin
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Helen Martin
b. ~1899
Source mother
● Household
· direct · ~0.92
Mother
Carrie Martin
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Martin
Son · 1940 · age 22 · b. ~1918 · Pennsylvania
★ 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 — Lehigh-County, Pennsylvania
Open full size
1940 US Federal Census — Lehigh-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03548-00293)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Kenneth Rohrbach | 12 | Son | — | Pennsylvania |
| 42 | Lois Rohrbach | 12 | Daughter | — | Pennsylvania |
| 43 | Nancy Rohrbach | 10 | Daughter | — | Pennsylvania |
| 44 | Frank Jr Rohrbach | 9 | Son | — | Pennsylvania |
| 45 | Loretta Rohrbach | 7 | Daughter | — | Pennsylvania |
| 46 | Ronald Rohrbach | 5 | Son | — | Pennsylvania |
| 47 | Jerome Rohrbach | 4 | Son | — | Pennsylvania |
| 48 | Hiram Christman | 38 | Head | Polisher | Pennsylvania |
| 49 | Hattie Christman | 38 | Wife | Housewife | Pennsylvania |
| 50 | Kenneth Christman | 19 | Son | Store Clerk | Pennsylvania |
| 51 | Doris Christman | 17 | Daughter | — | Pennsylvania |
| 52 | Edward H. Roschi | 74 | Head | Laborer | Pennsylvania |
| 53 | Lucy A. Roschi | 67 | Wife | Housewife | Pennsylvania |
| 54 | John A. Walbert | 45 | In law | Laborer | Pennsylvania |
| 55 | Bertha C. Walbert | 46 | Wife | Housewife | Pennsylvania |
| 56 | William Eck | 34 | Head | — | Pennsylvania |
| 57 | Robert Eck | 14 | Son | — | Pennsylvania |
| 58 | Lucilla Eck | 9 | Daughter | — | Pennsylvania |
| 59 | Morris Snyder | 30 | Lodger | Laborer | Pennsylvania |
| 60 | Fuller Heilman | 26 | Head | Laborer | Pennsylvania |
| 61 | Erma Heilman | 18 | Wife | Housewife | Pennsylvania |
| 62 | Infant Heilman | 0 | Daughter | — | Pennsylvania |
| 63 | Alvin S. Rambo | 63 | Head | — | Pennsylvania |
| 64 | Glendora Rambo | 49 | Wife | Housewife | Pennsylvania |
| 65 | Steward Frank | 27 | Son | Laborer | Pennsylvania |
| 66 | Helen Frank | 23 | Daughter | — | Pennsylvania |
| 67 | Esther Rauch | 19 | Daughter | Sewing | Pennsylvania |
| 68 | William Harris | 70 | Head | Florist | Pennsylvania |
| 69 | Harry R. Harris | 44 | Son | Florist | Pennsylvania |
| 70 | Florence Harris | 43 | Daughter in law | Housewife | Pennsylvania |
| 71 | Elaine Harris | 14 | Daughter | — | Pennsylvania |
| 72 | Richard Harris | 9 | Son | — | Pennsylvania |
| 73 | William Harris | 7 | Son | — | Pennsylvania |
| 74 | Robert Harris | 5 | Son | — | Pennsylvania |
| 75 | E. K. Bond | 77 | Head | Granite Mason | Pennsylvania |
| 76 | Robert M. Martin THIS PERSON | 22 | Son | Garage | Pennsylvania |
| 77 | Jerry Franz | 47 | Head | Patroler Main. Sect. | Pennsylvania |
| 78 | Carrie Franz | 43 | Wife | Housewife | Pennsylvania |
| 79 | Annie Zimmerman | 61 | Mother in law | Housewife | Pennsylvania |
| 80 | Franklin Frank | 22 | Son | Laborer | Pennsylvania |
Pedigree Summary
Robert
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)