Also found this:
According to history.com the late Jack Benny (d. in 1974) was a
litvak. His
name was Benjamin Kubelsky. Does anyone know more about his roots?
From Jack Benny' Passport Applications, ..the name was Ben Kubelsky
[Jack Benny]
Birth Date:14 Feb 1894
Birth Place:Chicago, Illinois
Residence:Hotel Hargrave, New York
Passport Issue Date:12 Jul 1923
Father Name:Meyer Kubelsky
Father's Birth Location:Russia
Father's Residence:Lake Forest, Illinois
Passport Includes a Photo
From other information;
Father: Mayer Kubelsky born abt 1864 Lithuania Home in 1930: Lake
Forest, Lake, Illinois ( 1930 census)
Mother: Emma Sachs, died before 1930
sister; Florence Fenchel born 1901 her husband; Leonard L Fenchel
born abt 1893
Wife: Mary Livingstone (Stage name , related to the Marx brothers,
married 24-Feb-1927 )
Daughter: Joan Naomi (adopted)
There was another Kubelsky family in Chicago that is most likely
related. Most Kubelsky family members came from Lithuania.
Source:
http://www.eilatgordinlevitan.com/guestbook_view.html