The newborn son of Sweden's Princess Madeleine and New York banker Christopher O'Neill has been baptized near Stockholm.

Prince Nicolas Paul Gustaf, also to be known as the Duke of Angermanland after a province in northern Sweden, is the first grandson of King Carl XVI Gustaf, who has two granddaughters. Nicolas was born on June 15 in Stockholm.

Some 150 guests — mostly family and friends — attended the ceremony on Sunday in the church of Drottingholm Palace just outside Stockholm.

Nicolas is sixth in line to the Swedish throne after his sister, Princess Leonore. Their mother is fourth.

Sweden is a constitutional monarchy in which the royals primarily serve as figureheads. The king is the country's head of state, but his powers are limited to ceremonial duties.