Who is Hyman Kadetsky and where did he go?

Over the snowday on Tuesday January 27, 2015, the misforcast "Snowmagedon" I came across an unknown Hyman Kadetsky living in Chicago. I have only uncovered hints of him but no census records for him and his family. The first hint of his existence is a death certificate for his son, Arthur Kadet on https://familysearch.org/ark:/61903/1:1:QV9V-7X6F. From this record we learn that a Hyman Kadetsky was married to Ruth Lent. They had a son, Arthur Kadet who was born October 17, 1926 in Illinois and died April 17, 1979 in Chicago Illinois. Arthur married Marilyn Hoffman. He was buried at the Westlawn Jewish Cemetery in Chicago. On the death certificate is a M. Bradbury.
The second record of Hyman's existence comes from his wife's death certificate, https://familysearch.org/ark:/61903/1:1:QV9J-V1S2 . Ruth Kadetsky nee Lent died on January 4, 1976 and was buried on January 6 at the Westlawn Cemetery. Her parents names were Wolf Lent and Tzivia Karneson. She was a widow. She was born December 27, 1900 in Poland. Named on her death certificate is Arthur Kadet.
I have a strong suspicion that this Hyman Kadetsky is in fact the son of Abraham Kadetsky and Necca Karniszyn of Everett, Massachusetts. They had a son Hyman Kadetsky, born February 28, 1891 in Biezun, Poland. On the 1920 Census he lived with his parents in Everett Massachusetts but then all traces all him disappeared. Until now? Did he marry and move to Chicago. Was his wife a relative through his mother's family (Karneson vs Karniszyn)? Here is his World War 1 draft registration card. https://familysearch.org/pal:/MM9.3.1/TH-1961-25977-7654-53?cc=1968530