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John Muller — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this John Muller across the 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a son (b.~1905), then head of a 9-person household.
Age 25
b. ~1905
Male
Son
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Muller |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Clerk |
| Industry | Grocery Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Clerk |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1905 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Muller | Son | — | 25 | ~1905 |
| Barbara Muller | Son | — | 19 | ~1911 |
| Mary Muller | Daughter | — | 24 | ~1906 |
| John Muller | Head | — | 53 | ~1877 |
| Anita Muller | Daughter | — | 15 | ~1915 |
| Anna Muller | Daughter | — | 17 | ~1913 |
| Una Muller | Daughter | — | 18 | ~1912 |
| Margaret Muller | Daughter | — | 21 | ~1909 |
| Katherine Muller | Spouse | — | 54 | ~1876 |
Census Appearances
1930
Baltimore, Maryland
Son, age 25
Baltimore, Maryland · implied b. ~1905 — 9 household members
| Surname | Muller |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Clerk |
| Industry | Grocery Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 36
Baltimore-City-County, Maryland · implied b. ~1904 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Miller |
| Given Name | John J. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore |
| Occupation | skill labour |
| Industry | Edgewood Arsenal |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1144 |
| Highest Grade | H 6 |
| 1935 Residence | Same place |
| 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 Muller across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Muller
Son · 1930 · age 25 · b. ~1905 · Maryland
★ You are viewing this record
Sibling
Mary Muller
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Muller
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Muller
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Muller
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anita Muller
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Una Muller
Sibling · 1930 · age 18
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
41 people indexed on this census page (ia:1930:15thcensus854unit:0253)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William W. Childs | 58 | Wife-H | — | Maryland |
| 2 | Mary E. Childs | 31 | Daughter | School Teacher | Maryland |
| 3 | Lillian E. Childs | 30 | Daughter | School Teacher | Maryland |
| 4 | Agnes B. Childs | 18 | Daughter | — | Maryland |
| 5 | Emil R. Lehnert | 58 | Head | Bank Mfg. | Maryland |
| 6 | Julia Lehnert | 53 | Wife | — | Maryland |
| 7 | Sophia E. Raabe | 81 | Mother-in-law | — | Maryland |
| 8 | John H. Raabe | 55 | Brother-in-law | — | Maryland |
| 9 | John J. Muller | 53 | Head | Salesman | Maryland |
| 10 | Katherine M. Muller | 54 | Wife | — | Maryland |
| 11 | John J. Muller THIS PERSON | 25 | Son | Clerk | Maryland |
| 12 | Mary R. Muller | 24 | Daughter | Typist | Maryland |
| 13 | Margaret A. Muller | 21 | Daughter | Stenog. | Maryland |
| 14 | Barbara P. Muller | 19 | Son | Clerk | Maryland |
| 15 | Una M. Muller | 18 | Daughter | — | Maryland |
| 16 | Anna M. Muller | 17 | Daughter | — | Maryland |
| 17 | Anita M. Muller | 15 | Daughter | — | Maryland |
| 18 | Martin H. Epple | 32 | Head | Clerk | Maryland |
| 19 | Gertrude J. Epple | 31 | Wife | — | Maryland |
| 20 | Doris E. Epple | 5 | Daughter | — | Maryland |
| 21 | James J. Grogan | 28 | Head | Electrician | Maryland |
| 22 | Mary H. Grogan | 26 | Wife | — | Maryland |
| 23 | James J. Grogan | 5 | Son | — | Maryland |
| 24 | Charles H. Niser | 73 | Head | — | Maryland |
| 25 | George E. Niser | 35 | Son | Janitor | Maryland |
| 26 | Philip J. Niser | 30 | Son | Glazier | Maryland |
| 27 | Clark Ganger | 30 | Head | Clerk | Maryland |
| 28 | Marjorie Ganger | 25 | Wife | — | Maryland |
| 29 | James L. Mcnamee | 50 | Head | Clerk | Maryland |
| 30 | Elizabeth V. Mcnamee | 41 | Wife | — | Maryland |
| 31 | Mary E. Mcnamee | 19 | Daughter | Typist | Maryland |
| 32 | Edgar J. Mcnamee | 18 | Son | Clerk | Maryland |
| 33 | David J. Mcnamee | 12 | Son | — | Maryland |
| 34 | Bessie A. Miller | 23 | Boarder | Clerk | Maryland |
| 35 | Marion A. Sellers | 55 | Head | Clerk | Maryland |
| 36 | Lilian B. Sellers | 39 | Sister | Saleswoman | Maryland |
| 37 | James E. Magill | 50 | Head | Inspector | Maryland |
| 38 | Katherine M. Magill | 48 | Wife | — | Maryland |
| 39 | Mary L. Magill | 23 | Daughter | Typist | Maryland |
| 40 | Edward J. Magill | 22 | Son | Time Man | Maryland |
| 41 | Arthur J. Magill | 21 | Son | Clerk | Maryland |
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)