RC
Ralph Clark — 1930 US Census Record
Model Tree available1930 United States Federal Census · Knox, Maine
Our Model Tree links this Ralph Clark across the 1920, 1930 and 1940 US Censuses in Knox, Maine (XGBoost, ~Confirmed), with identified parents Albertus & Effie — first a son (b.~1901), then head of a 5-person household.
Age 29
b. ~1901
Male
Son
Born: Maine
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Knox, Maine |
| Surname | Clark |
| Given Name | Ralph C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Maine |
| Age at First Marriage | 26 |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Additional Details | |
| Occupation | Stone cutter |
| Industry | Stone quarry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Occupation | Stone Cutter |
| Township / Ward | Rockland City |
| Est. Birth Year | ~1901 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Ralph | Age | Birth yr |
|---|---|---|---|---|
| Leroy Clark | Son | — | 19 | ~1911 |
| Effie Clark | Spouse | — | 63 | ~1867 |
| Phyllis Clark | Other | — | 22 | ~1908 |
| Ralph Clark | Son | — | 29 | ~1901 |
| Albertus Clark | Head | — | 58 | ~1872 |
Census Appearances
1920
Knox, Maine
Son, age 18
Knox, Maine · implied b. ~1902 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clarke |
| Given Name | Ralph C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Occupation | Register of |
| Industry | Deeds |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Knox, Maine
Son, age 29
Knox, Maine · implied b. ~1901 — 5 household members
| Surname | Clark |
| Given Name | Ralph C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Maine |
| Age at First Marriage | 26 |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Occupation | Stone cutter |
| Industry | Stone quarry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
Knox-County, Maine
Head, age 39
Knox-County, Maine · implied b. ~1901 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clarke |
| Given Name | Ralph C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Rockland City |
| 1935 Residence (County) | Knox |
| Occupation | Manager |
| Industry | Grocery Store |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 1721 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Ralph Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Albertus Clarke (~0.92 confidence) and mother Effie Clark (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Albertus Clarke
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Effie Clark
b. ~1867
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ralph Clark
Son · 1930 · age 29 · b. ~1901 · Maine
★ You are viewing this record
Sibling
Leroy Clark
Sibling · 1930 · age 19
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 — Knox, Maine
Open full size
1930 US Federal Census — Knox, Maine
Page Contents
50 people indexed on this census page (ia:1930:15thcensus835unit:0341)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Emil Rivers | 34 | Head | Carpenter | Finland |
| 2 | Jennie Rivers | 35 | Wife | — | Finland |
| 3 | Ophelia Rivers | 10 | Daughter | — | Maine |
| 4 | Jenny Rivers | 8 | Daughter | — | Maine |
| 5 | Frank Nord | 28 | — | Mason | Sweden |
| 6 | Vosta Mecklin | 34 | — | Stone Cutter | Finland |
| 7 | Nestor U. Hannuko | 24 | — | Stone Cutter | Finland |
| 8 | Fred Clydenza | 42 | — | Stone Cutter | Finland |
| 9 | Clarence Knowlton | 53 | Head | Proprietor | Maine |
| 10 | Ellen Knowlton | 52 | Wife | Waitress | Maine |
| 11 | Gladys M. Murphy | 25 | Daughter | Waitress | Maine |
| 12 | Cecil C. Murphy | 24 | Son-in-law | Truck Driver | Maine |
| 13 | Verona S. Murphy | 6 | Granddaughter | — | Maine |
| 14 | Gareth M. Murphy | 4 | Grandson | — | Maine |
| 15 | Clifford E. Murphy | 1 | Grandson | — | Maine |
| 16 | Hyman W. Sunt | 27 | Head | Laborer | Maine |
| 17 | Hester R. Sunt | 24 | Wife | — | Maine |
| 18 | Alton E. Drinkwater | 35 | Head | — | Maine |
| 19 | Dorothy M. Drinkwater | 34 | Sister | — | Maine |
| 20 | Shirley M. Drinkwater | 15 | Sister | — | Maine |
| 21 | Mary B. Knight | 48 | Mother | — | Maine |
| 22 | Roscoe E. Knight | 13 | Brother | — | Maine |
| 23 | John E. Knight | 11 | Brother | — | Maine |
| 24 | Stanley S. Knight | 10 | Brother | — | Maine |
| 25 | Ina M. Knight | 7 | Sister | — | Maine |
| 26 | Christian Panyio | 48 | Head | Stone Cutter | Finland |
| 27 | Aina V. Panyio | 39 | Wife | — | Finland |
| 28 | Ina Panyio | 15 | Daughter | — | Maine |
| 29 | Suoma S. Panyio | 13 | Daughter | — | Maine |
| 30 | Buna S. Panyio | 11 | Daughter | — | Maine |
| 31 | Tempie S. Panyio | 10 | Daughter | — | Maine |
| 32 | Waino C. Panyio | 8 | Son | — | Maine |
| 33 | Onni C. Panyio | 6 | Son | — | Maine |
| 34 | Edward S. Spear | 49 | Head | Manager | Maine |
| 35 | Bertha M. Spear | 39 | Wife | — | Maine |
| 36 | Gladys P. Jones | 20 | Daughter | — | Maine |
| 37 | Elden Leroy Jones | 18 | Son | — | Maine |
| 38 | Charles F. Stevens | 43 | Head | Laborer | Maine |
| 39 | Mary E. Stevens | 52 | Wife | Laborer | Maine |
| 40 | Raymond F. Stevens | 14 | Son | Picker | Maine |
| 41 | Albertus W. Clark | 58 | Head | — | Maine |
| 42 | Effie M. Clark | 63 | Wife | — | Maine |
| 43 | Ralph C. Clark THIS PERSON | 29 | Son | Stone Cutter | Maine |
| 44 | Phyllis M. Clark | 22 | Daughter-in-law | — | Maine |
| 45 | Leroy Clark | 19 | Son | Truck Driver | Maine |
| 46 | John S. Ahlberg | 49 | Head | Painter | Sweden |
| 47 | Anna C. Ahlberg | 51 | Wife | — | Sweden |
| 48 | Esther M. Ahlberg | 19 | Daughter | Operator | Massachusetts |
| 49 | Charles H. Macwhinnie | 48 | Head | Inspector | Maine |
| 50 | Grace M. Macwhinnie | 48 | Wife | — | Maine |
Pedigree Summary
Ralph + 1 sibling
Gen 1 · 2 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)