RG
Robert Griffith — 1930 US Census Record
Model Tree available1930 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this Robert Griffith across the 1920, 1930 and 1940 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed), with identified parents Robert & Annie — first a son (b.~1915), then head of a 6-person household.
Age 15
b. ~1915
Male
Son
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Allegheny, Pennsylvania |
| Surname | Griffith |
| Given Name | Robert Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1915 |
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 1930 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Mary Griffith | Daughter | — | 8 | ~1922 |
| Annie Griffith | Spouse | — | 46 | ~1884 |
| Robert Griffith | Head | — | 47 | ~1883 |
| Rose Griffith | Daughter | — | 21 | ~1909 |
| Robert Griffith | Son | — | 15 | ~1915 |
| Sarah Griffith | Daughter | — | 11 | ~1919 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 5
Allegheny, Pennsylvania · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffiths |
| Given Name | Robert J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 15
Allegheny, Pennsylvania · implied b. ~1915 — 6 household members
| Surname | Griffith |
| Given Name | Robert Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 25
Allegheny-County, Pennsylvania · implied b. ~1915 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffiths |
| Given Name | Robert J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Bartender |
| Industry | Hotel & Restaurant Business |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 714 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Griffith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Griffith (~0.92 confidence) and mother Annie Griffith (~0.92 confidence) and mother Brena Griffiths (~0.92 confidence) and mother Irene Griffiths (~0.92 confidence) and mother Margaret Griffiths (~0.50 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Father
Robert Griffith
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Annie Griffith
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Brena Griffiths
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Irene Griffiths
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Margaret Griffiths
b. ~1919
Source mother
● Household
· direct · ~0.5
This person
Anchor record
Robert Griffith
Son · 1930 · age 15 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
Mary Griffith
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Griffith
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Griffith
Sibling · 1930 · age 21
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
1930 US Federal Census — Allegheny, Pennsylvania
Open full size
1930 US Federal Census — Allegheny, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel1980:0799)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John White | 63 | Head | Retired | England |
| 2 | Bridget White | 55 | Wife | — | Ireland |
| 3 | John W White | 28 | Son | Salesman | Pennsylvania |
| 4 | Elizabeth White | 20 | Daughter | Clerk | Pennsylvania |
| 5 | Alice Hixon | 27 | Lodger | — | W Virginia |
| 6 | Gerard Macellaro | 57 | Head | Proprietor | Italy |
| 7 | Mary Macellaro | 47 | Wife | — | Italy |
| 8 | Patrick Macellaro | 30 | Son | Tailor | Italy |
| 9 | John Macellaro | 27 | Son | Manager | Italy |
| 10 | Rose Macellaro | 21 | Daughter | — | Italy |
| 11 | America Macellaro | 17 | Son | — | New York City |
| 12 | Lena Macellaro | 15 | Daughter | — | Italy |
| 13 | Mildred Macellaro | 10 | Daughter | — | Pennsylvania |
| 14 | Violet Macellaro | 4 | Daughter | — | Pennsylvania |
| 15 | Robert Griffith | 47 | Head | Salesman | England |
| 16 | Annie Griffith | 46 | Wife | — | Pennsylvania |
| 17 | Rose Griffith | 21 | Daughter | Nurse | Pennsylvania |
| 18 | Robert Jr Griffith THIS PERSON | 15 | Son | — | Pennsylvania |
| 19 | Sarah Griffith | 11 | Daughter | — | Pennsylvania |
| 20 | Mary Griffith | 8 | Daughter | — | Pennsylvania |
| 21 | Samuel Griffith | 42 | Head | Clerk | England |
| 22 | Mary J Griffith | 41 | Wife | — | Pennsylvania |
| 23 | Samuel Jr Griffith | 18 | Son | — | Pennsylvania |
| 24 | Samuel H Griffith | 15 | Son | — | Pennsylvania |
| 25 | John W Griffith | 23 | Head | Policeman | Pennsylvania |
| 26 | Margaret Griffith | 21 | Wife | — | Pennsylvania |
| 27 | Stephen Hager | 39 | Head | Engineer | New York State |
| 28 | Helen Hager | 33 | Wife | — | Illinois |
| 29 | Helen Hager | 9 | Daughter | — | Pennsylvania |
| 30 | Gertrude Mccarney | 46 | Head | Merchant | Ohio |
| 31 | John Mccarney | 17 | Son | — | Pennsylvania |
| 32 | Joseph Purpura | 47 | Head | Proprietor | Italy |
| 33 | Cosma Purpura | 52 | Wife | — | Italy |
| 34 | Thomas Purpura | 30 | Son | Proprietor | Italy |
| 35 | Lawrence Purpura | 26 | Son | Lawyer | Pennsylvania |
| 36 | Christina Purpura | 23 | Daughter | — | Pennsylvania |
| 37 | Mary Purpura | 21 | Daughter | — | Pennsylvania |
| 38 | Joseph Purpura | 19 | Son | — | Pennsylvania |
| 39 | Mariano Purpura | 32 | Head | Proprietor | Pennsylvania |
| 40 | Angeline Purpura | 25 | Wife | Proprietor | New York |
| 41 | Joseph Purpura | 3 | Son | — | Pennsylvania |
| 42 | Alice Griffith | 31 | Head | Laundress | New York State |
| 43 | Joseph Reid | 52 | Lodger | Superintendent | England |
| 44 | Irving Reid | 22 | Lodger | Engineer | Ohio |
| 45 | Alice Reid | 20 | Lodger | — | Ohio |
| 46 | John Heinsius | 70 | Head | Retired | Germany |
| 47 | Christine Heinsius | 65 | Sister | Baker | Germany |
| 48 | Frank Pagano | 57 | Head | Contractor | Italy |
| 49 | Katherine Pagano | 47 | Wife | — | Pennsylvania |
| 50 | Peter Pagano | 24 | Son | Carpenter | Pennsylvania |
Related Census Records
Pedigree Summary
Robert + 3 siblings
Gen 1 · 5 parents
~0.84
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)