In 1328 Alfonso "Avenger" XI King Castile (age 16) and Maria Burgundy Queen Consort Castile (age 15) were married. She by marriage Queen Consort Castile. She the daughter of Alfonso "Brave" IV King Portugal (age 36) and Beatrice Ivrea Queen Consort Portugal (age 35). He the son of Ferdinand IV King Castile IV King Leon and Constance Burgundy Queen Consort Castile Queen Consort Leon. They were double first cousins. He a great x 4 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry "Curtmantle" II of England.

On 12 Nov 1543 Philip "The Prudent" II King Spain (age 16) and Maria Aviz (age 16) were married at Salamanca. She the daughter of John III King Portugal (age 41) and Catherine of Austria Queen Consort Portugal (age 36). He the son of Charles V Holy Roman Emperor (age 43) and Isabel Aviz Queen Consort Spain. They were double first cousins. He a great x 5 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.

In 1552 John Manuel Aviz Prince Portugal (age 14) and Joanna of Austria Princess Portugal (age 16) were married. She the daughter of Charles V Holy Roman Emperor (age 51) and Isabel Aviz Queen Consort Spain. He the son of John III King Portugal (age 49) and Catherine of Austria Queen Consort Portugal (age 44). They were double first cousins. He a great x 5 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward III of England.

In 1660 Louis "Sun King" XIV King France (age 21) and Maria Theresa of Spain Queen Consort France (age 21) were married. She by marriage Queen Consort of France. She the daughter of Philip IV King Spain (age 54) and Elisabeth Bourbon Queen Consort Spain. He the son of Louis XIII King France and Anne of Austria Spain Queen Consort France (age 58). They were double first cousins.