After Eleanor's marriage, many of her Savoyard relatives joined her in England. At least 170 Savoyards arrived in England after 1236, coming from Savoy, Burgundy and Flanders, including Eleanor's uncles, the later Archbishop Boniface of Canterbury and William of Savoy, Henry's chief adviser for a short period. Henry arranged marriages for many of them into the English nobility, a practice that initially caused friction with the English barons, who resisted landed estates passing into the hands of foreigners. The Savoyards were careful not to exacerbate the situation and became increasingly integrated into English baronial society, forming an important power base for Eleanor in England.