From memory the first posting I made to this newsgroup, in the 1990s, was in response to someone who had asserted that the famous admiral Roger of Lauria's daughter married to Enrico of Sanseverino, constable of Sicily, was named Maria and not Ilaria (they are ancestors of anyone descended from Jacquetta of Luxemburg-St Pol, amongst many others). I didn't find a contemporary source to disprove this error, but cited the great 16th-century historian Jeronimo Zurita as a more reliable authority than the source for "Maria". Today I came across two letters from Pope John XXII that show Zurita was right to name her Ilaria - the first is to the minister-general of the Franciscans dated 5 November 1319 ordering that she be allowed to construct a friary, referring to her as Ilaria di Lauria, widow of Enrico, son of the count of Sanseverino ("Ilaria de Lauria, vidua Henrici, nati comitis de s. Severino"); the second, dated 5 November 1329, is an indulgence of 100 days granted to those who on the feast day of St John the Baptist visited the church she was building in his honour for the friary at Cuccaro ("ecclesiam in honorem et sub vocabulo s[ancti] Joannis Baptistae dedicatam in quodam loco quem ad opus fratrum O[rdinis] M[inorum] n[obilis] m[ulier] Ilaria de Lauria, relicta quond[am] Henrici primogeniti quond[am] Thomasii de Sancto Severino, comitis Marsici, militis, vidua, in castro suo de Cuccaro ... aedificare incepit"). Peter Stewart