"American Origins: (As sent to me by Brian Dodd)Quote from ENCARTA 95
The American version of the Santa Claus figure received its inspiration and its name from the Dutch legend of Sinter Klaas, brought by settlers to New York in the 17th century.
As early as 1773 the name appeared in the American press as "St. A Claus,"
but it was the popular author Washington Irving who gave Americans their first detailed information about the Dutch version of Saint Nicholas. In his History of New York, published in 1809 under the pseudonym Diedrich Knickerbocker, Irving described the arrival of the saint on horseback (unaccompanied by Black Peter) each Eve of Saint Nicholas.
This Dutch-American Saint Nick achieved his fully Americanized form in 1823 in the poem A Visit From Saint Nicholas more commonly known as The Night Before Christmas by writer Clement Clarke Moore. Moore included such details as the names of the reindeer; Santa Claus's laughs, winks, and nods; and the method by which Saint Nicholas, referred to as an elf, returns up the chimney. (Moore's phrase "lays his finger aside of his nose" was drawn directly from Irving's 1809 description.)