The 1915 NY census (attached) age for Frank shows he was born in 1911. These may not be this man's parents.
Saint Wenceslaus Cemetery
Plot: Sec H
NOTE: Parents named on death certificate as James and Katherine (Dvec) Dvorak, not as Thomas and Mary (Hess) Dvorak. 
11/30/2020 - This man is listed on FamilySearch.org as having parents Wenzel Dvorak (b. 1832) and Katherine Hajny (b.1829).Fetterly-28 23:50, 30 November 2020 (UTC)Fetterly-28. I don't think these are his parents because the attached record shows that Frank born in 1911.
New York State Archives; Albany, New York; State Population Census Schedules, 1915; Election District: 05; Assembly District: 34; City: New York; County: Bronx; Page: 27. Ancestry.com. New York, U.S., State Census, 1915 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2012. Original data: State population census schedules, 1915. New York State Archives, Albany, New York. Text: