The Barony of Vostitsa was a medieval Frankish fiefdom of the Principality of Achaea, located in the northern coast of the Peloponnese peninsula in Greece, centred on the town of Vostitsa (Greek: Βοστίτζα; French: La Vostice; Italian: Lagostica; modern Aigio).

The Greek version gives his surname as "de Lele", which has been commonly interpreted as being a corruption of "de Lille", and claims that he adopted the surname "de Charpigny" afterwards; while the Aragonese version of the Chronicle mentions that the first baron was Guy, that Hugh was his son, named "Cherpini" after the Greek village where he was born (which some authors identify with Kerpini), and "Lello" was the name of a fortress constructed on the family's domains in Laconia (possibly Helos); to further complicate matters, the toponym "Charpigny" is not attested in contemporary France.

However, in 1327 a lady Agnes, daughter of a certain Geoffrey de Charpigny (according to Karl Hopf, who thought he was a son of Hugh II), is mentioned as entering possession of her "maternal heritage", and it was Guillemette of Charny, the (alleged) daughter of Geoffrey de Charny, who succeeded the two baronies along with her husband, Philip of Jonvelle (married in 1344).

[7] Various suggestions have been made to simplify the family tree, such as Agnes being the unnamed wife of Dreux of Charny, with Guillemette as her sister.

[8] According to Raymond-Joseph Loenertz, these genealogical problems have been created by some lapsus in Du Cange's work Histoire de l’Empire de Constantinople sous les empereurs français, complicated by Hopf's habit of presenting his own (sometimes gratuitous or unfounded) hypotheses as facts.