MG
Mary Griffin — 1930 US Census Record
Model Tree available1930 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Mary Griffin across the 1910, 1920 and 1930 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed), with identified parents Joseph & Anna — first a daughter (b.~1908), then head of a 3-person household.
Age 22
b. ~1908
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Philadelphia, Pennsylvania |
| Surname | Griffin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Clothing Mfg. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Stenographer |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1908 |
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.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Rose Griffin | Daughter | — | 25 | ~1905 |
| Mary Griffin | Daughter | — | 22 | ~1908 |
| William Griffin | Head | — | 54 | ~1876 |
Census Appearances
1910
Philadelphia, Pennsylvania
Daughter, age 2
Philadelphia, Pennsylvania · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | Mamie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Philadelphia, Pennsylvania
Daughter, age 12
Philadelphia, Pennsylvania · implied b. ~1908 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | Mary |
| 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 | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Philadelphia, Pennsylvania
Daughter, age 22
Philadelphia, Pennsylvania · implied b. ~1908 — 3 household members
| Surname | Griffin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Stenographer |
| Industry | Clothing Mfg. |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 Mary Griffin across 3 US Census years (1910, 1920 and 1930) in Philadelphia, Pennsylvania, using XGBoost record linkage. Identified parents: father Joseph Griffin (~0.92 confidence) and mother Anna Griffin (~0.92 confidence) and father William Griffin (~0.92 confidence) and father James Griffin (~0.92 confidence) and mother Lucy Griffin (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Griffin
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Anna Griffin
b. ~1874
Source mother
● Household
· direct · ~0.92
Father
William Griffin
b. ~1876
Source father
● Household
· direct · ~0.92
Father
James Griffin
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Lucy Griffin
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Griffin
Daughter · 1930 · age 22 · b. ~1908 · Pennsylvania
★ You are viewing this record
Sibling
Rose Griffin
Sibling · 1930 · age 25
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 — Philadelphia, Pennsylvania
Open full size
1930 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2103:0941)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Hess | 55 | Head | Proprietor | Pennsylvania |
| 2 | Elizabeth Hess | 53 | Wife | — | Pennsylvania |
| 3 | Howard J. Hess | 38 | Son | Photo Engraver | Pennsylvania |
| 4 | Sarah Hess | 31 | Wife | — | Pennsylvania |
| 5 | Howard Hess | 38 | Son | Clerk | Pennsylvania |
| 6 | Isabelle Hess | 30 | Sister | — | Pennsylvania |
| 7 | Isabella Griffin | 66 | Head | — | Pennsylvania |
| 8 | William Griffin | 54 | Head | — | Pennsylvania |
| 9 | Rose Griffin | 25 | Daughter | Sales Clerk | Pennsylvania |
| 10 | Mary Griffin THIS PERSON | 22 | Daughter | Stenographer | Pennsylvania |
| 11 | Joseph Hall | 36 | Head | Pattern Maker | Pennsylvania |
| 12 | Alice Hall | 36 | Wife | — | Pennsylvania |
| 13 | John Hall | 7 | Son | — | Pennsylvania |
| 14 | Alice Hall | 4 | Daughter | — | Pennsylvania |
| 15 | John A. Henderson | 45 | Head | Ironman | Sweden |
| 16 | Annie Henderson | 44 | Wife | — | Sweden |
| 17 | John Henderson | 17 | Son | — | Pennsylvania |
| 18 | Bernard Henderson | 15 | Son | — | Pennsylvania |
| 19 | Hugh Swayze | 68 | Head | Retired | England |
| 20 | Helen Swayze | 35 | Daughter | Machine Operator | Pennsylvania |
| 21 | Mary Swayze | 38 | Daughter | Machine Operator | Pennsylvania |
| 22 | Rose Swayze | 32 | Daughter | Machine Operator | Pennsylvania |
| 23 | Elizabeth Swayze | 28 | Daughter H | — | Pennsylvania |
| 24 | Alice Swayze | 25 | Daughter | Machine Operator | Pennsylvania |
| 25 | Helen Swayze | 13 | Granddaughter | — | Pennsylvania |
| 26 | James Dyer | 42 | Head | Laborer | Pennsylvania |
| 27 | Margaret Dyer | 5 | Daughter | — | Pennsylvania |
| 28 | James Dyer | 4 | Son | — | Pennsylvania |
| 29 | Joseph Lee | 37 | Head | Commercial Traveler | Maryland |
| 30 | Mary Lee | 33 | Wife H | — | Maryland |
| 31 | Mary A. Lee | 5 | Daughter | — | Maryland |
| 32 | Joseph Lee | 1 | Son | — | Maryland |
| 33 | Frederick Schmidt | 61 | Head | Electrician | New York |
| 34 | Theresa Schmidt | 62 | Wife H | — | New York |
| 35 | Winifred Schmidt | 30 | Daughter | — | New York |
| 36 | Joseph Schmidt | 56 | Boarder | Sales Clerk | Pennsylvania |
| 37 | Joseph Parr | 30 | Head | Traffic Clerk | Pennsylvania |
| 38 | Eleanor Parr | 35 | Wife H | — | Pennsylvania |
| 39 | Elizabeth Parr | 4 | Daughter | — | Pennsylvania |
| 40 | Paul Parr | 67 | Son | — | England |
| 41 | Elizabeth Parr | 65 | Wife | — | England |
| 42 | Margaret Dyer | 53 | Head | — | Pennsylvania |
| 43 | Margaret Dyer | 23 | Daughter | — | Pennsylvania |
| 44 | Margaret Dyer | 6 | Daughter | — | Pennsylvania |
| 45 | James Dyer | 3 | Son | — | Pennsylvania |
| 46 | Lawrence Stark | 38 | Head | Presser | Pennsylvania |
| 47 | Estelle Stark | 31 | Wife H | — | Pennsylvania |
| 48 | Dorothy Stark | 7 | Daughter | — | Pennsylvania |
| 49 | John Gorman | 63 | Head | — | Pennsylvania |
| 50 | Isabel Gorman | 42 | Daughter | — | Pennsylvania |
Pedigree Summary
Mary + 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 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)