Sprota was a Breton concubine captured in war and bound to William by a Danish marriage. There is no evidence that Sprota and William were ever married. After William died, Sprota became the wife of Esperleng, a wealthy miller; Rodulf of Ivry was a half-brother to Richard I.
Note: I can't say if Sprota was the mother of Richard I. Weis isn't clear and mistresses at this time were common. She may have been from Brittany, but Weis calls her a "Danish wife," which may come from William of Jumiáeges who states that she was bound to William by the Danish custom, "Danico more iuncta, nomine Sprota." The evidence that she was from Brittany is from Flodoard: "Rex Ludowicus filio ipsius Willelmi, nato de concubina Britanna, terram Nortmannorum dedit; ..." Flodoard is identifying Sprota as mother of Richard (Ludowicus) and calls Sprota a concubine from Brittany.
Sources
Flodoard of Reims. Flodoardi Chronicon (Reims : Regnier, 1855) See the year 943.
The Foundation for Medieval Genealogy's Mideieval Lands Index:
Guillaume of Jumièges records that, after the rebel “Riulfus” was defeated at the battle of "Pratum-belli", a messenger arrived “a...Fiscannensis castri” and reported to Guillaume the birth of his son to “nobilissima puella Danico more sibi iuncta...Sprota”
Ancestral Roots of Certain American Colonists Who Came to America before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr, ed. by William R. Beall & Kaleen E. Beall (Baltimore, 2008), line 121E-18 (Ganger Rolf).
If she was Sprote of Brittany (Bretagne) then she was NOT Adele of Normandie- an obvious effort to covince others of her descent from Heribert and the Vermandois. If as originally shown she was captured in Britanny and taken as a concubine, then she was (a) not of royal birth, (b )not of St Lis/Senlis which is outside of Paris, and (c) not of any other royal lineage. Find a Grave is wrong; her alt name of Adele is wrong (fictitious) anther connection with the Vermandois was invented somewhere along the line....oh what a tangled web we weave when first we practice to deceive........Sharon Richards
edited by Sharon Richards
https://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=132471168