1930 United States Federal Census

Validator (claude-sonnet-5-5, 2026-10-28): consistent, confidence 2/4, tier record.
The 1930 Milwaukee census page shows a Joseph, age 28, born in Austria, Bohemian-speaking, a welder, living next to Frank Konecny's household. This is consistent with a Moravian-born Joseph Konecny born around 1901. The record gives no birth date or village, and the age is one year younger than a February 1901 birth would give, so it only loosely supports the claim.
Matches: Line 98 (dwelling 20, family 25) is Joseph, head of household, white male, age 28, married, born Austria with Austrian-born parents; Mother tongue is given as Bohemian, which fits a Moravian birthplace within Austria-Hungary; Joseph is a welder at a steel company, in the same Milwaukee ward and block as Frank Konecny's household (line 93, dwelling 19), so a Konecny relative nearby is plausible; Age 28 on 11 April 1930 implies birth in about 1901–02, close to the claimed 1901
Limits: The surname on line 98 is not written out; it appears to be a ditto from Konecny above, so identification depends on that reading; A census gives an age and country of birth, not a date or village, so it cannot confirm 17 February 1901 or Svatý Štěpán / Brumov; Someone born 17 February 1901 would be 29 on the census date, so the recorded age of 28 is one year low, which is within tolerance but not an exact fit; The immigration year and naturalization columns are hard to read in this image; The census does not show whether this Joseph is the Joseph Konecny (1901–1985) in the database; that rests on other evidence