Turstin fitz Rolf, also known as Turstin le Blanc and Turstin fitz Rou played a prominent role in the Norman conquest of England and is regarded as one of the few proven companions of William the Conqueror at the Battle of Hastings in 1066.
He appears to have originated from Bec-de-Mortagne, Pays de Caux, Normandy,
As the prefix fitz indicates, Turstin was the son of a man called Rolf or Rou, names that are synonymous with their latinized equivalent Rollo (which may suggest descent from the founder of Normandy).
The given name Turstin originated in the Old Norse Þórstæinn (Thorstein; "Thor's stone") and is sometimes spelt Tosteins, Thurstan, Tostain and similar variants.
Turstin appears to have originated in Bec-de-Mortagne, Pays-de-Caux, Normandy, about five miles south-east of Fécamp, according to the Roman de Rou poem written by Wace(c. 1115 - 1183):
Tosteins fitz Rou-le-Blanc out non,
Al Bec en Caux aveit meison
([Modern French]: "Turstain FitzRou le Blanc au nom,
au Bec-en-Caux avait maison;
[Modern English]: "Turstin FitzRou the White by name,
had home at Bec-en-Caux.")
Orderic Vitalis wrote, sometime after 1110, “Turstinus filius Rollonis vexillum Normannorum portavit” ("Turstin son of Rollo carried the standard of the Normans.")
Wace wrote in his cronicle Roman de Rou as follows (loosely translated and dramatised by Sir Edward Creasy(died 1878)):
Then the Duke called for the standard which the Pope had sent him, and, he who bore it having unfolded it, the Duke took it and called to Raoul de Conches. “Bear my standard” said he “for I would not but do you right; by right and by ancestry your line are standard-bearers of Normandy, and very good knights have they all been”. But Raoul said that he would serve the Duke that day in other guise, and would fight the English with his hand as long as life should last.