In 1898, at the age of 13, Rayz immigrated to New York and adopted the Americanized name Isaac Reiss. Within a few years his work was published widely in the New York Yiddish press, under a variety of pseudonyms, including Rinnalde Rinaldine, Dilensee Mirkarosh, Der Royzenkavalir, Doctor Hotzikl, and, finally, Moishe Nadir. The name "Nadir" is a Yiddish expression meaning "here you are" or "that's for you," but can also mean "take this and choke on it."
