Before 1025 Dirk Gerulfing III Count Holland and Othelindis d Bernard Margrave Nordmark Count Holland were married. She by marriage Countess Holland. He the son of Arnulf Gerulfing Count Holland and Luitgarde Luxemburg Countess Holland.

Around 1050 Floris Gerulfing I Count Holland (age 24) and Gertrude Billung Countess Holland (age 20) were married. She by marriage Countess Holland. She the daughter of Bernard II Duke of Saxony (age 55) and Eilika Schweinfurt Duchess Saxony. He the son of Dirk Gerulfing III Count Holland and Othelindis d Bernard Margrave Nordmark Count Holland.

Around 1108 Floris II Gerulfing II Count Holland (age 23) and Gertrude Metz Countess Holland were married. She by marriage Countess Holland. She the daughter of Theodoric "Valiant" Metz II Duke Lorraine (age 53) and Hedwige Formbach Duchess Lorraine. He the son of Dirk Gerulfing V Count Holland and Othilde Countess Holland.

In or before 1139 Dirk Gerulfing VI Count Holland (age 25) and Sophie Salm Countess Holland (age 18) were married. She by marriage Countess Holland. He the son of Floris II Gerulfing II Count Holland and Gertrude Metz Countess Holland.

On 28 Sep 1162 Floris Gerulfing III Count Holland (age 21) and Ada Dunkeld Countess Holland (age 23) were married. She by marriage Countess Holland. She the daughter of Henry Dunkeld 3rd Earl Huntingdon 1st Earl of Northumbria and Ada Warenne Countess Huntingdon and Northumbria (age 42). He the son of Dirk Gerulfing VI Count Holland and Sophie Salm Countess Holland (age 42).

In 1186 Dirk Gerulfing VII Count Holland and Adelaide Cleves Countess Holland were married. She by marriage Countess Holland. She the daughter of Arnaud Cleves I Count Cleves and Ida Reginar Countess Cleves. He the son of Floris Gerulfing III Count Holland (age 45) and Ada Dunkeld Countess Holland (age 47).

In 1197 William Gerulfing I Count Holland (age 30) and Adelaide Guelders Countess Holland were married at Stavoren. She by marriage Countess Holland. She the daughter of Otto I Count Guelders (age 47) and Richardis Wittelsbach Countess Guelders (age 24). He the son of Floris Gerulfing III Count Holland and Ada Dunkeld Countess Holland (age 58).

In 1203 Louis II Count Loon and Ada Gerulfing I Countess Holland (age 15) were married. She by marriage Countess Holland. She the daughter of Dirk Gerulfing VII Count Holland and Adelaide Cleves Countess Holland.

On 06 Dec 1214 Floris Gerulfing IV Count Holland (age 4) and Mathilde Reginar Countess Holland and Palatine (age 14) were married. She by marriage Countess Holland. She the daughter of Henry Reginar VIII Duke Lower Lorraine I Duke Brabant (age 49) and Maud Metz. He the son of William Gerulfing I Count Holland (age 47) and Adelaide Guelders Countess Holland. They were half third cousin once removed. She a great x 3 granddaughter of King William "Conqueror" I of England.

In 1220 William Gerulfing I Count Holland (age 53) and Marie Reginar Countess Holland (age 30) were married. She by marriage Countess Holland. The difference in their ages was 23 years. She the daughter of Henry Reginar VIII Duke Lower Lorraine I Duke Brabant (age 55) and Maud Metz. He the son of Floris Gerulfing III Count Holland and Ada Dunkeld Countess Holland. They were half third cousins. She a great x 3 granddaughter of King William "Conqueror" I of England.

In 1252 William Gerulfing II Count Holland (age 24) and Elizabeth Brunswick-Lüneburg Countess Holland (age 22) were married. She by marriage Countess Holland. She the daughter of Otto "Child" Brunswick-Lüneburg Duke Brunswick-Lüneburg (age 48). He the son of Floris Gerulfing IV Count Holland and Mathilde Reginar Countess Holland and Palatine (age 52). He a great x 4 grandson of King William "Conqueror" I of England.

Around 1270 Floris Gerulfing V Count Holland (age 15) and Beatrix Dampierre (age 10) were married. She by marriage Countess Holland. She the daughter of Guy Dampierre Count Flanders (age 44) and Mathilde Bethune. He the son of William Gerulfing II Count Holland and Elizabeth Brunswick-Lüneburg Countess Holland. They were fourth cousins. He a great x 5 grandson of King William "Conqueror" I of England. She a great x 5 granddaughter of King William "Conqueror" I of England.

On 19 May 1305 William Hainault I Count Hainault III Count Avesnes III Count Holland II Count Zeeland (age 19) and Joan Valois Countess Zeeland Holland Avesnes and Hainault (age 11) were married. She by marriage Countess Zeeland, Countess Holland, Countess Avesnes, Countess Hainault. She the daughter of Charles Valois I Count Valois (age 35) and Margaret Capet Countess Valois. He the son of John Hainault II Count Hainault II Count Holland and Philippa Luxemburg Countess Hainault and Holland (age 53). She a great x 4 granddaughter of King Henry "Curtmantle" II of England.

Dirk Gerulfing V Count Holland and Othilde Countess Holland were married. She by marriage Countess Holland. He the son of Floris Gerulfing I Count Holland and Gertrude Billung Countess Holland.

John Hainault II Count Hainault II Count Holland and Philippa Luxemburg Countess Hainault and Holland were married. She by marriage Countess Hainault, Countess Holland. She the daughter of Henry "Great" Luxemburg V Count Luxemburg III Count Namur and Margaret of Bar Countess Luxemburg and Namur. He the son of John Hainault I Count Hainault and Adelaide Gerulfing Countess Hainault. They were third cousin once removed. He a great x 5 grandson of King William "Conqueror" I of England. She a great x 5 granddaughter of King William "Conqueror" I of England.