Robert Scalio
Robert de Hauteville (born early 1060s?),{{citation |author=Stavros G. Georgiou |title=Guy de Hauteville, a Norman Noble in the Service of Alexios I Komnenos (1081–1118) |journal=Aiônos: Miscellanea di Studi Storici |volume=22 |year=2022 |doi=10.53136/97912218082784 |pages=73–97}}, at 73–74. also called Robert Scalio or Robert Guiscard II,{{citation |author=John Tuzson |title=István II (1116–1131): A Chapter in Medieval Hungarian History |publisher=East European Monographs |year=2002 |location=Boulder, CO |pages=22–23}}.{{citation |author-link=Ferdinand Chalandon |author=Ferdinand Chalandon |title=Histoire de la domination normande en Italie et en Sicile |location=Paris |publisher=A. Picard |year=1907 |volume=1}}, [https://archive.org/details/histoiredeladom00chalgoog/page/289/mode/1up pp. 289–290] (calling him "Robert II Guiscard"). was a younger son of Robert Guiscard, Duke of Apulia, and his second wife, Sikelgaita. The sources do not agree concerning whether he was older or younger than his brother Guy.{{citation |author=Ferdinand Chalandon |title=Histoire de la domination normande en Italie et en Sicile |location=Paris |publisher=A. Picard |year=1907 |volume=1}}, [https://archive.org/details/histoiredeladom00chalgoog/page/283/mode/1up p. 283]. Romuald of Salerno lists him before Guy.{{citation |author=John Tuzson |title=István II (1116–1131): A Chapter in Medieval Hungarian History |publisher=East European Monographs |year=2002 |location=Boulder, CO |page=84}}.
Robert accompanied his elder brother Roger Borsa in 1086, when the latter went to Palermo to confirm his possessions in the County of Sicily. He signed as a witness the document issued by Roger granting to the abbey of La Cava the monastery of the Holy Spirit in Bari. He is last recorded in Sicily in 1096.
John Tuzson argues that Robert later moved to Hungary in the following of his cousin, Queen Felicia, the wife of King Coloman of Hungary. Felicia, unnamed, is described as "a lady of the highest nobility, daughter of King Robert Guiscard of Apulia" in the 14th-century Chronicon Pictum.{{citation |editor1=János M. Bak |editor2=László Veszprémy |title=The Illuminated Chronicle: Chronicle of the Deeds of the Hungarians from the Fourteenth-Century Illuminated Codex |year=2018 |publisher=Central European University Press |location=Budapest |pages=286–287}}. It is universally recognized that her father could not have been Robert Guiscard. It has generally been concluded that he was in fact Prince Robert I of Capua, but Tuzson argues that he was Count Roger I of Sicily, Robert Guiscard's brother. He connects the younger Robert Guiscard and the queen's entourage to the Hungarian kindred of Oliver and Ratold, which the Chronicon claims originated in Caserta.{{citation |editor1=János M. Bak |editor2=László Veszprémy |title=The Illuminated Chronicle: Chronicle of the Deeds of the Hungarians from the Fourteenth-Century Illuminated Codex |year=2018 |publisher=Central European University Press |location=Budapest |pages=88–89}}.