Passage: Arthur Ashkin was born in Brooklyn, New York, in 1922, to a family of Ukrainian-Jewish background.  His parents were Isadore and Anna Ashkin. He had two siblings, a brother, Julius, also a physicist, and a sister, Ruth. One older sibling, Gertrude, died while young. The family home was in Brooklyn, New York, at 983 E 27 Street. Isadore (né Ashkinazi) had immigrated to the United States from Odessa (then Russian Empire, now Ukraine), at the age of 18. Anna, five years younger, also came from today's Ukraine, then Galicia, Austro-Hungarian Empire. Within a decade of his landing in New York, Isadore had become a U.S. citizen and was running a dental laboratory at 139 Delancey Street in Manhattan.Ashkin met his wife, Aline, at Cornell University, and they have been married over 60 years with three children and five grandchildren. She was a chemistry teacher at Holmdel High School, and their son Michael Ashkin, is an art professor at Cornell University.

Question: Who left Odessa to go to the United States at 18 years old?
Isadore