Di,
You say his father's name might be Morris - have you seen the following reference to a Maurice Leavitt on the 1901 census?
Maurice Leavitt, age 59, born Russia (Russian subject), no census place listed, census county Lancaster, occupation tailor, and in the same household Rose Leavitt, age 49, born Russia (Russian subject).
Did his father come to this country too?
Sasha.