JW
John Willis — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this John Willis across the 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 15-person household.
Age 8
b. ~1922
Male
Son
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Willis |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Oregon |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Dundalk Trappe Road |
| Est. Birth Year | ~1922 |
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.
15 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Matilda Willis | Daughter | — | 5 | ~1925 |
| Catharine Willis | Daughter | — | 18 | ~1912 |
| Emma Willis | Daughter | — | 16 | ~1914 |
| Dora Willis | Daughter | — | 10 | ~1920 |
| Frank Willis | Head | — | 46 | ~1884 |
| Albert Willis | Son | — | 7 | ~1923 |
| Frank Willis | Son | — | 27 | ~1903 |
| Lawrence Willis | Son | — | 14 | ~1916 |
| Joseph Willis | Son | — | 12 | ~1918 |
| Clarence Willis | Son | — | 2 | ~1928 |
| Charles Willis | Son | — | 17 | ~1913 |
| David Willis | Son | — | 21 | ~1909 |
| John Willis | Son | — | 8 | ~1922 |
| Ferdinand Willis | Son | — | 23 | ~1907 |
| Annie Willis | Spouse | — | 45 | ~1885 |
Census Appearances
1930
Baltimore, Maryland
Son, age 8
Baltimore, Maryland · implied b. ~1922 — 15 household members
| Surname | Willis |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Oregon |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Son, age 19
Baltimore-County, Maryland · implied b. ~1921 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wills |
| Given Name | John J |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Baltimore |
| Occupation | 40 |
| Industry | wiper |
| Class of Worker | cannery |
| Highest Grade | No 7 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 John Willis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Willis
Son · 1930 · age 8 · b. ~1922 · Maryland
★ You are viewing this record
Sibling
Charles Willis
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Willis
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catharine Willis
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dora Willis
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matilda Willis
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Willis
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Willis
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Willis
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Willis
Sibling · 1930 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Willis
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Willis
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ferdinand Willis
Sibling · 1930 · age 23
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 — Baltimore, Maryland
Open full size
1930 US Federal Census — Baltimore, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus847unit:0015)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Emma Eckes | 51 | Wife | — | Maryland |
| 52 | Elizabeth E. Eckes | 80 | Mother | — | Germany |
| 53 | John Gorski | 44 | Head | Heater | Poland |
| 54 | Nellie Gorski | 32 | Wife | — | Austria |
| 55 | George L. Penner | 35 | Head | Proprietor | Maryland |
| 56 | Edith M. Penner | 27 | Wife | — | Pennsylvania |
| 57 | Gerald L. Penner | 9 | Son | — | Maryland |
| 58 | George W. Penner | 5 | Son | — | Maryland |
| 59 | George M. Bauer | 29 | Head | Fireman | Maryland |
| 60 | Barbara M. Bauer | 28 | Wife | — | Maryland |
| 61 | George M. Bauer | 5 | Son | — | Maryland |
| 62 | Frank Schultz | 20 | Bro-in-law | Insulator | Maryland |
| 63 | John L. Schriefer | 23 | Head | Pipe Fitter | Maryland |
| 64 | Evelyn M. Schriefer | 23 | Wife | — | Maryland |
| 65 | John A. Schriefer | 4 | Son | — | Maryland |
| 66 | George R. Schriefer | 1 | Son | — | Maryland |
| 67 | Dorothy G. Schriefer | 0 | Daughter | — | Maryland |
| 68 | Frank Edw. Willis | 46 | Head | Repairman | Oregon |
| 69 | Annie E. Willis | 45 | Wife | — | Maryland |
| 70 | Frank W. Willis | 27 | Son | Laborer | Maryland |
| 71 | Ferdinand Willis | 23 | Son | Ruffler | Maryland |
| 72 | David B. Willis | 21 | Son | Handy Man | Maryland |
| 73 | Catharine M. Willis | 18 | Daughter | Laborer | Maryland |
| 74 | Charles J. Willis | 17 | Son | Laborer | Maryland |
| 75 | Emma B. Willis | 16 | Daughter | — | Maryland |
| 76 | Lawrence Willis | 14 | Son | — | Maryland |
| 77 | Joseph Willis | 12 | Son | — | Maryland |
| 78 | Dora Willis | 10 | Daughter | — | Maryland |
| 79 | John J. Willis THIS PERSON | 8 | Son | — | Maryland |
| 80 | Albert Willis | 7 | Son | — | Maryland |
| 81 | Matilda Willis | 5 | Daughter | — | Maryland |
| 82 | Clarence Willis | 2 | Son | — | Maryland |
| 83 | John E. Athen | 29 | Head | Lineman | Maryland |
| 84 | Verna E. Athen | 25 | Wife | — | Maryland |
| 85 | Robert H. Athen | 3 | Son | — | Maryland |
| 86 | John G. Panzer | 25 | Head | Doubler | Maryland |
| 87 | Mary A. Panzer | 25 | Wife | — | Maryland |
| 88 | Eva M. Panzer | 4 | Daughter | — | Maryland |
| 89 | Martha E. Panzer | 3 | Daughter | — | Maryland |
| 90 | Eva Solimowski | 66 | Mo-in-law | — | Poland |
| 91 | Frederick W. Marquard | 41 | Head | Foreman | Maryland |
| 92 | Elizabeth E. Marquard | 41 | Wife | — | Maryland |
| 93 | Carl P. Marquard | 18 | Son | Electrician | Maryland |
| 94 | Dorothy E. Marquard | 20 | Daughter | Operator | Maryland |
| 95 | George L. Marquard | 14 | Son | — | Maryland |
| 96 | Laura V. Sipple | 80 | Mo-in-law | — | Maryland |
| 97 | James C. Kerr | 34 | Head | Rollers Helper | Pennsylvania |
| 98 | Grace E. Kerr | 35 | Wife | — | Dist. of Columbia |
| 99 | James C. Kerr | 5 | Son | — | Maryland |
| 100 | Charles R. Fontana | 39 | Head | Carpenter | Austria |
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)