Answer 1
The name Leonard is a Jewish Name.
Here are some well known Jews you may have heard of with the name Leonard.
Leonard G. Horowitz the famous Aids doctor, Leonard Cohen the musician, The Russian Jew Leonard Nimoy of Star Trek, NBC President Leonard Grossman, The Black Rock star with a Jewish Father Leonard Kravitz, Banker Leonard Abess, Writer Leonard Wolf, The Famous Communist Leonard Zinberg the list goes on.
Side Note. Sometimes you may find a Catholic with the name Leonard, but they are of Jewish parents that pretended to convert after WW2 to hide their Jewish heritage
Answer 2
Leonard is not a particularly Jewish name. It is actually a Germanic name meaning "brave" (nard) "lion" (leo). The above answer lists some famous Jews with the name Leonard, but Leonard is in no way a traditional Jewish name.
Leonard Bernstein's mother's name was Jennie Bernstein.
Although Howell is not a stereotypically Jewish surname, any name can be a Jewish name if it is the name of a Jewish person.
Although Salada is not a Jewish surname in its origin, any name can be a Jewish name if it is the name of a Jewish person.
Full Name is Sir Winston Leonard Spencer Churchill
Peters can be a Jewish name (if it is a name used by a Jewish family) but it need not be Jewish. The name is used by Jews and by non-Jews. Think of all those Scandinavians.
Yes
Yes.
Stew Leonard was raised Catholic, but he converted to Judaism later in life. So technically, yes, he is Jewish. But really, who cares? It's not like his religion affects the quality of his groceries or anything. Just enjoy the milk and cookies and leave the man's personal beliefs out of it.
Jewish
His parents were Jewish, and so is he.
Jewish food
The name Patricia in Polish is spelled "Patrycja" and the name Leonard in Polish is spelled "Leonard."
His last name is Leonard.
Leonard Stone's birth name is Leonard Steinbock.
Leonard Yorr's birth name is Leonard Yedlin.
Leonard Barr's birth name is Leonard Barra.
Leonard Fenton's birth name is Leonard Feinstein.