Boulogne-Billancourt | Boulogne-sur-Mer | Boulogne | Bois de Boulogne | Duchenne de Boulogne | Ballymore Eustace | William I, Count of Boulogne | The Eustace Diamonds | Eustace Mullins | Count of Boulogne | Eustace Robert Hayles | Eustace IV, Count of Boulogne | Eustace III, Count of Boulogne | Eustace II, Count of Boulogne | Eustace | Sir Eustace Tennyson d'Eyncourt, 1st Baronet | Sir Eustace Tennyson d'Eyncourt | Saint Eustace | Rowland Eustace, 2nd Viscount Baltinglass | Matilda of Boulogne | Mary Jo Eustace | Lord Eustace Cecil | Ida, Countess of Boulogne | Gare de Boulogne-Ville | Eustace of Boulogne | Eustace Loraine | Eustace I, Count of Boulogne | Eustace de Balliol | Eustace Chapuys | Eustace Budgell |
On his death the county of Boulogne was inherited by his daughter, Matilda, and her husband Stephen de Blois, count of Mortain, afterwards king of England, and at the death of Matilda in 1152 it was inherited by their son, Eustace IV of Boulogne, later their second son William and ultimately by their daughter Marie of Boulogne, since both sons died without children.