They were a Jewish family who emigrated with Leonard's four grandparents to the United States around 1890. Leonard attended school in Philadelphia and his remarkable academic talents were clear at this time.
Sila ay Hudyo ng isang pamilya na emigrated sa Leonard's grandparents sa apat na ang Pilipinas sa paligid ng 1890. Leonard pumasok sa paaralan sa Philadelphia at ang kanyang pansin academic talento ay malinaw na sa oras na ito.