 Willem I Count von Holland, son of Floris III Count von Holland, Count of Holland and Ada Princess von Schottland.Born ± ABT. 1167 at 'S-Gravenhage, Zuid-Holland, Netherlands, died Feb 4, 1222, approximately 55 years Married 1198 (19 or 20 years married) to:  Aleid Countess Van Gelre, daughter of Otto I Count von Gelre and Richardis Prinzessin von Bayern.Born ± ABT. 1187 at Of, Zutphen, Gelderland, Netherlands, died Feb 4, 1218, approximately 31 years Children: 1. Ada Countess von HollandBorn ± ABT. 1202 at Of 'S-Gravenhage, Z-Holl., Neth., died Jun 15, 1258, approximately 56 years 2. Richardis Countess von HollandBorn ± ABT. 1203 at Of 'S-Gravenhage, Z-Holl., Neth., died Jan 3, 1262, approximately 59 years 3. Willem Count von HollandBorn ± ABT. 1206 at Of 'S-Gravenhage, Z-Holl., Neth., died Aug 30, 1238, approximately 32 years 4. Otto Count von HollandBorn ± ABT. 1208 at Of 'S-Gravenhage, Z-Holl., Neth., died Apr 3, 1249, approximately 41 years 5. Floris IV Count von Holland, Count of HollandBorn Jun 24, 1210 at Of 'S-Gravenhage, Zuid Holland, Neth., died Jul 19, 1234 at Corbie, Picardy, France, 24 years | |||
| 2nd marriage Willem I Count von Holland, son of Floris III Count von Holland, Count of Holland and Ada Princess von Schottland.Married Jul 1220 (1 years married) to: Marie Prinzessin von Brabant, daughter of Henry I Duke von Brabant, Duke of Brabant and Matilda von Boulogne.Born ± ABT. 1190, died Mar 9, 1260, approximately 70 years, 1st marriage to: Otto IV Emperor von Deutschland, 2nd marriage to: Willem I Count von Holland | |||