1930 United States Federal Census

Validator (claude-sonnet-5-5, 2026-10-28): consistent, confidence 2/4, tier record.
The attached image is sheet 4B of ED 40-121, Milwaukee. The only plausible match is line 77, Mary, wife of James Hejnarl, age 27, married, born in Bohemia-Austria. That fits the 1903 birth year, the wife relationship, the married status and the place. The surname on the page is not Konecny, so the identification depends on the researcher's other evidence (for example a later or earlier marriage).
Matches: Sheet 4B, Milwaukee, ED 40-121 matches the citation (page 4B, ED 0121, Milwaukee, Wisconsin); Line 77: Mary, Wife-H, married, age 27, which implies a birth year of about 1903; She was born in Bohemia-Austria, which fits a Czech-American family; She is the only wife on the page aged about 27; other Marys are 49 and 45 (wives) or 59 (a widowed head)
Flags: The household surname reads Hejnarl/Heynarl (head James, 40), not Konecny. Nothing on the page links Mary to the Konecny name.
Limits: The census gives an age, not a birth date, so 1903 is only approximate; The record does not show a later marriage or remarriage that would explain a Konecny surname; My identification of Mary as line 77 is by age and role, and the handwriting is hard to read; The page does not show whether she is the Mary Konecny of the database, which would need her maiden name or a later husband