RC
Robert Clark — 1920 US Census Record
Model Tree available1920 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this Robert Clark across the 1900, 1910 and 1920 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed), with identified parents Robert & Alfred — first a son (b.~1887), then head of a 8-person household.
Age 33
b. ~1887
Male
Son
Born: Pennsylvania
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Allegheny, Pennsylvania |
| Surname | Clark |
| Given Name | Robert M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Occupation | Electrician |
| Industry | Rail Road |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Electrician |
| Township / Ward | Mckeesport City |
| Est. Birth Year | ~1887 |
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.
8 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Gertrude Clark | Daughter | — | 45 | ~1875 |
| Irene Clark | Daughter | — | 35 | ~1885 |
| Alfred Clark | Head | — | 71 | ~1849 |
| Harry Clark | Son | — | 40 | ~1880 |
| Howard Clark | Son | — | 31 | ~1889 |
| Robert Clark | Son | — | 33 | ~1887 |
| Willard Clark | Son | — | 25 | ~1895 |
| Mary Clark | Spouse | — | 65 | ~1855 |
Census Appearances
1900
Allegheny, Pennsylvania
Son, age 13
Allegheny, Pennsylvania · implied b. ~1887 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Robert W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Birth Month | May |
| Birth Year | 1887 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | at School |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1910
Allegheny, Pennsylvania
Son, age 22
Allegheny, Pennsylvania · implied b. ~1888 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Robert W Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| 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 |
1920
Allegheny, Pennsylvania
Son, age 33
Allegheny, Pennsylvania · implied b. ~1887 — 8 household members
| Surname | Clark |
| Given Name | Robert M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Electrician |
| Industry | Rail Road |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | 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 Robert Clark across 3 US Census years (1900, 1910 and 1920) in Allegheny, Pennsylvania, using XGBoost record linkage. Identified parents: father Robert Clark (~0.92 confidence) and father Alfred Clark (~0.92 confidence) and mother Mary Clark (~0.92 confidence) and mother Ella Clark (~0.92 confidence) and mother Elmore Clark (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Clark
b. ~1848
Source father
● Household
· direct · ~0.92
Father
Alfred Clark
b. ~1849
Source father
● Household
· direct · ~0.92
Mother
Mary Clark
b. ~1855
Source mother
● Household
· direct · ~0.92
Mother
Ella Clark
b. ~1863
Source mother
● Household
· direct · ~0.92
Mother
Elmore Clark
b. ~1852
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Clark
Son · 1920 · age 33 · b. ~1887 · Pennsylvania
★ You are viewing this record
Sibling
Gertrude Clark
Sibling · 1920 · age 45
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Clark
Sibling · 1920 · age 35
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Howard Clark
Sibling · 1920 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Clark
Sibling · 1920 · age 40
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Willard Clark
Sibling · 1920 · 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
1920 US Federal Census — Allegheny, Pennsylvania
Open full size
1920 US Federal Census — Allegheny, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1530unit:0659)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur | 28 | Head | Laborer | Pennsylvania |
| 2 | Florence | 19 | Wife | — | Pennsylvania |
| 3 | George A Burns | 45 | Head | Conductor | Pennsylvania |
| 4 | Mary F Burns | 44 | Wife | — | Pennsylvania |
| 5 | William Mccullough | 60 | Head | Laborer | Pennsylvania |
| 6 | Nellie E Mccullough | 45 | Wife | — | Pennsylvania |
| 7 | Lester W Mccullough | 25 | Son | Brake Man | Pennsylvania |
| 8 | William E Mccullough | 22 | Son | Apprentice | Pennsylvania |
| 9 | William Neal | 51 | Head | Laborer | Pennsylvania |
| 10 | Lydia Neal | 47 | Wife | — | Pennsylvania |
| 11 | Jacob J Johns | 67 | Head | — | Pennsylvania |
| 12 | Imogene Johns | 42 | Daughter | Assistant | Pennsylvania |
| 13 | Edna M Johns | 31 | Daughter | Teacher | Pennsylvania |
| 14 | Pauline G Johns | 24 | Daughter | Stenographer | Pennsylvania |
| 15 | James A Miller | 79 | Head | — | Pennsylvania |
| 16 | Isaac Byell | 72 | Boarder | Home Maker | Pennsylvania |
| 17 | William H Robert | 28 | Head | Belt Maker | Pennsylvania |
| 18 | Bessie Robert | 27 | Wife | — | Pennsylvania |
| 19 | Isaac E Johns | 29 | Head | — | Pennsylvania |
| 20 | Lila P Johns | 25 | Wife | — | Pennsylvania |
| 21 | Isaac E Jr Johns | 1 | Son | — | Pennsylvania |
| 22 | Elizabeth Brough | 53 | Mother-in-law | — | Pennsylvania |
| 23 | Charles Fisher | 73 | Head | Stationary Engineer | Pennsylvania |
| 24 | Emma V Fisher | 57 | Wife | — | Pennsylvania |
| 25 | Maggie P Fisher | 32 | Daughter | Stenographer | Pennsylvania |
| 26 | Alfred Clark | 71 | Head | — | Pennsylvania |
| 27 | Mary Clark | 65 | Wife | — | Pennsylvania |
| 28 | Harry E Clark | 40 | Son | Stationary Engineer | Pennsylvania |
| 29 | Robert M Clark THIS PERSON | 33 | Son | Electrician | Pennsylvania |
| 30 | Howard E Clark | 31 | Son | Clerk | Pennsylvania |
| 31 | Willard C Clark | 25 | Son | Clerk | Pennsylvania |
| 32 | Gertrude E Clark | 45 | Daughter | Stenographer | Pennsylvania |
| 33 | Irene E Clark | 35 | Daughter | Stenographer | Pennsylvania |
| 34 | Thomas J Breen | 52 | Head | Conductor | Michigan |
| 35 | Lois F Breen | 45 | Wife | — | Michigan |
| 36 | Marguerite M Breen | 20 | Daughter | Stenographer | Michigan |
| 37 | Robert E Muir | 50 | Head | Gardner | Scotland |
| 38 | Margaret V Muir | 50 | Wife | — | Scotland |
| 39 | Alexander Muir | 23 | Son | Stenographer | Pennsylvania |
| 40 | Geo D Bassett | 45 | Head | Proprietor | Pennsylvania |
| 41 | Ida M Bassett | 44 | Wife | — | Pennsylvania |
| 42 | L Genevieve Bassett | 21 | Daughter | Clerk | Pennsylvania |
| 43 | Carl E Miller | 21 | Head | Laborer | Pennsylvania |
| 44 | Lena Miller | 22 | Wife | — | Pennsylvania |
| 45 | William M Turner | 44 | Head | Clerk | Pennsylvania |
| 46 | Charlotte Hopkins | 50 | Head | — | England |
| 47 | Alice B Hopkins | 21 | Daughter | — | Pennsylvania |
| 48 | Carlton B Swift | 28 | Head | Plumber | Pennsylvania |
| 49 | Hazel E Swift | 23 | Wife | — | Pennsylvania |
| 50 | Thomas De Luca | 46 | Head | Machinist | Italy |
Pedigree Summary
Robert + 5 siblings
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 1920 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)