On page 151 of Eleanor of Aquitaine by Alison Weir she says "On 10 January 1156, having spent more than a year in England, Henry crossed from Dover to Wissant and returned to Normandy to attend to the affairs of his continental fiefs, leaving Richard de Lucy as regent and placing Eleanor and their children under the guardianship of Archbishop Theobald and John of Salisbury; the Pipe Rolls show that the Queen was paid allowances for the two boys, and also record that she was supporting in her household her sister Petronilla and their two bastard brothers, William and Joscelin. During the period 1154-8 there are thirty-six entries relating to Exchequer payments to William, as well as regular payments of generous sums for wine for Petronilla."
She says that Petronilla was married to Raoul, count of Vermandois and that he died in 1151. She further says that Petronilla's date of death is not recorded.
9. ENGLAND John "Lackland" King Of, b. 24 Dec 1166, Kings Manor House, Oxford, Oxfordshire, England , d. 19 Oct 1216, , Newark, Nottinghamshire, England