V Floris
V was born on June 24th, 1210 in Gravenhage, Zuid-Holland, Netherlands.  He died at the age of 24 on July 19th, 1234 in France.

 Mathilde De Brabant
Mathilde was born about 1200 in Hertogenbosch, Noord Brabant, Netherland.

 Countess of Avesnes Aleida
Countess of Avesnes was born about 1226 in Hertogenbosch, Noord-Brabant, Netherlands.  She died on April 9th, 1283 in Valenciennes, Nord, France.

 II William
II was born in 1227 in Hertogenbosch, Noord Brabant, Netherland.

 VI Floris
VI was born about 1228.

 Countess of Holland Machteld
Countess of Holland was born about 1232.