Julius Wilford "Nicky" Arnstein (born Arndstein; July 1, 1879 – October 2, 1965) was an American professional gambler and con artist.
He was known primarily as Julius Arnold, but among his aliases were "Jules Arndtsteyn", "Nick Arnold," "Nicholas Arnold", "Wallace Ames", "John Adams", and "J.
Willard Adair".
He was best known as the second husband of entertainer Fanny Brice.