*Aleida Countess of Holland
born 1226 's-Hertogenbosch, Noord-Brabant, Netherlands
died 9 April 1283 Valenciennes, Nord, France

father:
*Floris IV Count of Holland
born 24 June 1210 Zuid Gravenhage, Zuid Holland, Netherlands
died 19 July 1234 Rhijnsburg, Zuid Holland, Netherlands

mother:
*Mahaut (Maud or Mathilde) de Brabant
born about 1200 Brabant, Belgium
died 21 December 1267
buried Loosduinen, Zuid Holland, Netherlands
married before 06 December 1224

siblings:
Willem de Holland born 1227 's-Hertogenbosch, Noord Brabant, Netherlands
died 28 January 1256 Noord Hoogwoud, Noord Holland, Netherlands
Floris Count of Holland born about 1228 's-Hertogenbosch, Noord-Brabant, Netherlands
died 24 March 1258
Margaretha Countess of Holland born about 1230 's Hertogenbosch, Noord-Brabant, Netherlands
died 26 March 1277
Machteld Countess of Holland born about 1232 's-Hertogenbosch, Noord-Brabrant, Netherlands

spouse:
*Jean I de Hainault d'Avesnes Count in Flanders
born 1 May 1218 Etraeungt, Nord, France or Houffalize, Luxembourg
died 24 December 1257 Valenciennes, Nord, France
married September 1246 Frankfort-am-Main, Hessen-Nassau

children:
*Jean II de Holland d'Avesnes born 1247 Brabrant, Netherlands died 22 August 1304 Valenciennes, Nord, France
Marguerite d'Avesnes born about 1246 Valenciennes, Nord, France
Baudouin d'Avesnes born about 1249 Valenciennes, Nord, France
Bouchard (Bishop) d'Avesnes born 26 May 1251 Valenciennes, Nord, France died 29 November 1296
Guillaume (Bishop) d'Avesnes born about 1254 Valenciennes, Nord, France died 1296
Floris d'Avesnes born about 1255 Valenciennes, Nord, France died 23 January 1297
Jeanne d'Avesnes born about 1256 Valenciennes, Nord, France died 1304

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com