Robert IV the Strong was born 820 to Robert III of Worms (800-822) and Waldrada (801-?) and died 25 August 866 Brissarthe, Anjou, France of unspecified causes. He married Adelaide of Tours (820-866) .
|Offspring of Robert and Adelaide of Tours (820-866)|
|Odo of France (c860-898)||860||898||Théodrate of Troyes (868-903)|
|Robert I of France (866-923)||15 August 866 Wormsgau, Germany||15 June 923 Soissons, Aisne, Hauts-de-France, France||Aelis Aelis Béatrice of Vermandois (c880-931)|