1940 United States Federal Census

Validator (claude-sonnet-5-5, 2026-10-28): consistent, confidence 2/4, tier record.
The 1940 Milwaukee census shows Joseph Konecny, 39, born in Bohemia, with wife Agnes and sons Robert, Walter and Joseph. The age fits a 1901 birth, and a foreign birthplace in the Czech lands is consistent with the claim. The record gives no exact date or village, so it cannot confirm the birth details.
Matches: Line 2: Joseph Konecny (spelled Konecny), head of household, male, white, age 39, married; Age 39 on 17 April 1940 implies birth in 1900–1901, which fits 17 February 1901; Place of birth given as Bohemia, so foreign-born from the Czech lands; Wife Agnes (36) is also born in Bohemia, and the sons are Robert, Walter and Joseph, all born in Wisconsin
Limits: A census gives an age, not a birth date, so 17 February 1901 is not stated; Place of birth is only 'Bohemia'. It does not name Svatý Štěpán, Bylnice or Brumov, and it does not say Moravia (the enumerator may have used 'Bohemia' loosely); Nothing in the record ties this Joseph to the 1901–1985 person other than name, age and origin; the claim does not name a spouse or children to check against; Handwriting is small and the household is only identified by name and age