JM
John Mack — 1930 US Census Record
Model Tree available1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this John Mack across the 1920, 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed), with identified parents James & Mary — first a son (b.~1915), then head of a 4-person household.
Age 15
b. ~1915
Male
Son
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Mack |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1915 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| James Mack | Head | — | 42 | ~1888 |
| Mary Mack | Spouse | — | 40 | ~1890 |
| George Mack | Son | — | 17 | ~1913 |
| John Mack | Son | — | 15 | ~1915 |
Census Appearances
1920
None, Maryland
Son, age 5
None, Maryland · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mack |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Virginia |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 15
Baltimore, Maryland · implied b. ~1915 — 4 household members
| Surname | Mack |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Other, age 26
Baltimore-City-County, Maryland · implied b. ~1914 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mack |
| Given Name | Johnson |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Garbage |
| Industry | City |
| Class of Worker | PW |
| Income (1939) | 84 |
| Highest Grade | No |
| 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 Mack across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father James Mack (~0.92 confidence) and mother Mary Mack (~0.92 confidence) and father John Mack (~0.92 confidence) and mother Bessie Mack (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mack
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Mary Mack
b. ~1890
Source mother
● Household
· direct · ~0.92
Father
John Mack
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Bessie Mack
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mack
Son · 1930 · age 15 · b. ~1915 · Maryland
★ You are viewing this record
Sibling
George Mack
Sibling · 1930 · age 17
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:1930:15thcensus855unit:0021)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rosa Amendt | 22 | Servant | House Maid | Maryland |
| 2 | James E. Wilkinson | 29 | Head | Teacher | Maryland |
| 3 | Sidney S. Wilkinson | 27 | Wife | Teacher | Maryland |
| 4 | William Linden | 58 | Head | Traveling Salesman | Pennsylvania |
| 5 | Annie Linden | 51 | Wife | — | Pennsylvania |
| 6 | Martha Culver | 58 | Head-H | Nurse | Maryland |
| 7 | Helen Culver | 27 | Daughter | — | Maryland |
| 8 | Carrie Ewell | 70 | Head-H | — | Delaware, Southern |
| 9 | Bertha Mayer | 38 | Lodger | Maid | Denmark |
| 10 | Louis M. Williamson | 40 | Head | Secretary | Maryland |
| 11 | Lillian Williamson | 37 | Wife | Assistant | Maryland |
| 12 | William A. Rogers | 57 | Head | Clerk | Virginia |
| 13 | Nellie Rogers | 54 | Wife | — | Virginia |
| 14 | Elizabeth Rogers | 21 | Daughter | — | Virginia |
| 15 | Lucy Aiken | 54 | Head-H | — | Virginia |
| 16 | Charles Aiken | 30 | Son | Draftsman | Maryland |
| 17 | Ruth Mcfadden | 44 | Head-H | Nurse | Indiana |
| 18 | Nell Smith | 44 | Lodger | Nurse | Pennsylvania |
| 19 | Charles Rogers | 66 | Head | — | Maryland |
| 20 | Annie Rogers | 61 | Wife | — | Maryland |
| 21 | Charles Jr. Rogers | 31 | Head | Salesman | Maryland |
| 22 | Mary Rogers | 28 | Wife | — | Maryland |
| 23 | Elizabeth Maclean | 50 | Head-H | Artist | Maryland |
| 24 | Mary Maclean | 27 | Daughter | Saleswoman | District of Columbia |
| 25 | Elizabeth Maclean | 21 | Daughter | Library Clerk | Maryland |
| 26 | Eva Thomas | 47 | Mother-in-law | — | Virginia |
| 27 | James Smith | 32 | Head | Manufacturer | Florida |
| 28 | Edith Smith | 28 | Wife | — | Maryland |
| 29 | James Jr. Smith | 4 | Son | — | Maryland |
| 30 | Anne Jarvis | 40 | Lodger | — | Maryland |
| 31 | Frances Jarvis | 21 | Lodger | Nurse | Maryland |
| 32 | Katherine Harris | 26 | Lodger | Nurse | Virginia |
| 33 | Bennie Bird | 20 | Lodger | Nurse | North Carolina |
| 34 | Martha Stansbury | 24 | Lodger | Nurse | Virginia |
| 35 | James Mack | 42 | Head | Ambulance | Maryland |
| 36 | Mary A. Mack | 40 | Wife | — | Maryland |
| 37 | George H. Mack | 17 | Son | — | Maryland |
| 38 | John E. Mack THIS PERSON | 15 | Son | — | Maryland |
| 39 | John J. Rogers | 42 | Head | Pipe Fitter | Ireland-Northern |
| 40 | Mary E. Rogers | 33 | Wife | — | Pennsylvania |
| 41 | Cecilia M. Rogers | 4 | Daughter | — | Maryland |
| 42 | Mary J. Rogers | 2 | Daughter | — | Maryland |
| 43 | Colleen E. Rogers | 0 | Daughter | — | Maryland |
| 44 | Nannie J. Kunkie | 70 | Head-H | Proprietress | Maryland |
| 45 | Henry Funk | 34 | Lodger | Baker | Germany |
| 46 | Peter Truber | 40 | Lodger | Baker | Maryland |
| 47 | Isaac E. Harden | 40 | Lodger | Janitor | South Carolina |
| 48 | Mary E. Minor | 58 | Head-H | Saleswoman | Virginia |
| 49 | Mary E. Hinne | 49 | Head-H | House Maid | Maryland |
| 50 | William S. Hinne | 24 | Son | Clerk | Maryland |
Pedigree Summary
John + 1 sibling
Gen 1 · 4 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)