There have been four different Marmion Baronies.
The first was gained by Robert Marmion, Lord of Fontenay and Castellan of Falais Castle when he was granted the lordship and castle of Tamworth after the exile of Roger d'Abetot (nephew and heir of the King's Steward, Robert Despenser) between 1110 and 1114.
A second was obtained by Roger Marmion, Lord of Fontenay during the Norman invasion of Wales when he was rewarded with the Barony of Llanstephan whose castle played a central role in the Welsh wars.
The third was created for the eldest son of the 3rd Baron Marmion of Tamworth when he was granted the lordship of Winteringham.
Its final creation was by writ of summons for William Marmion to Simon de Montfort's Parliament in 1264, but was not continued after the rebels' defeat at Evesham in 1265.
According to Cokayne "the earliest known occurrence of the Marmion name seems to be that of a William Marmion who exchanged 12 acres of land with Ralf Taisson, son of Ralf the Angevin, which were granted by the latter to the abbey of Fontenay before Oct 1049 and who acted as a witness to a confirmation charter by William Duke of Normandy in 1060. Due to similarities between the coats of arms of the Taisson and Marmion families there is some speculation that they were related.
In 1140 King Stephen left Robert Marmion of Fontenay in charge of defending Falaise Castle from Geoffrey of Anjou. Falaise was the birthplace of William the Conqueror and former seat of the Dukes of Normandy so was a big prize. Robert, was "a warlike man with no match for boldness, fierceness or cunning" and his successful defence of Falaise so angered Geoffrey that he marched to Fontenay and captured and destroyed Marmion's own castle.