Royal baptism: Princess Charlotte's second-born peers

Britain may have been ruled by Queen Elizabeth II for over 60 years, but the next monarch will most certainly be a king - with Charles, William and George waiting in line. Princess Charlotte (right) - born to William and Kate in May, and being baptized on Sunday, July 5 - is not a likely contender to the throne, but if her uncle Prince Harry is any example, second borns get to have all the fun.

While second-in-line to the Dutch throne after her big sister Catharina-Amalia, Princess Alexia of the Netherlands (right) nonetheless keeps a busy schedule of royal appointments. At the age of 10 she already speaks Dutch, English and Spanish. Outside of Royal duties, the Princess reportedly enjoys horse riding and ballet, and is a keen hockey player.

Before 1990 and the modernizing of Norway's succession laws, Prince Sverre Magnus (right) would certainly have been monarch, but now that job goes to his big sister Princess Ingrid Alexandra. Born in 2005, His Highness has been called charming and cheeky, and inherited the striking Nordic looks of his mum, Mette-Marit, who brought her older non-royal son, Marius (center), into the family.

The royal household of Monaco has always been a crowd-pleaser - with more than its share of flair and scandal. While reigning monarch Prince Albert II has had two children out of wedlock, the birth of twins to his wife Charlene in 2014 confirmed legitimate succession to newly born Prince Jacques…even though he was born two minutes after his twin sister Princess Gabriella.

So far, Princess Victoria and husband Daniel of Sweden only have one child: three-year-old Princess Estelle, heir to the throne after her mother. However, there are rumors the Princess is again pregnant - rumors currently denied by the royal household. Nonetheless, under Sweden's laws of absolute primogeniture, Princess Estelle's succession to the throne is secure even if a sibling were male.

They say two's a crowd, but in the case of the Danish Royal household there are four. Crown Prince Frederik's marriage to Australian commoner Mary Donaldson enchanted millions, and they haven't disappointed on the procreation front. Princess Isabella (left), born in 2007, is the couple's second child following Prince Christian in 2005. Twins Prince Vincent and Princess Josephine followed in 2011.

European royals have a penchant for tongue-twisting monikers, and King Philippe and Queen Mathilde of Belgium didn't disappoint with their second-born, Prince Gabriel Baudouin Charles Marie, His Royal Highness of Belgium. His hearty name is matched with an equally bold coat of arms, replete with three fierce-looking gold lions, chivalrous armory and an opulently bejeweled crown.

Born in 2007, Infanta Sofía of Spain - the full name Sofía de Todos los Santos de Borbón y Ortiz - is the second child of the freshly crowned King Felipe VI and Queen Letizia. She was named for her paternal grandmother, Sofia of Greece and Denmark, and is second-in-line to the House of Bourbon after her older sister, Leonor. Sofía is a direct descendent of Henry IV, aka Henry the Great.