| # | Children | Name | Born | Died | Father | Mother |
| 1 | | | b. 1160 | d. 1 Jan 1225 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise de Beaumont, Countess of Gloucester |
| 2 | | | b. Abt 1164 | d. 1166 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise de Beaumont, Countess of Gloucester |
| 3 | | | b. 1150 | d. 1195 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise de Beaumont |
| 4 | | | b. Abt 1150 | d. DECEASED | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise de Beaumont |
| 5 | | | b. Abt 1152 | d. 1191 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise de Beaumont |
| 6 | | | b. 1155 | d. 1198 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise de Beaumont |
| 7 | | | b. 1166 | d. 14 Oct 1217 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise de Beaumont |
| 8 | | | b. 1189 | d. 14 Oct 1217 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise de Beaumont |
| 9 | | | b. 1145 | d. 1186 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise ( Beaumont) De Bellomont |
| 10 | | | b. Abt 1148 | d. DECEASED | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise ( Beaumont) De Bellomont |
| 11 | | | b. 1151 | d. 1199 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise ( Beaumont) De Bellomont |
| 12 | | | b. 1160 | d. 1 Jan 1224 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise ( Beaumont) De Bellomont |
| 13 | | | b. 1168 | d. DECEASED | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise ( Beaumont) De Bellomont |
| 14 | | | b. 1170 | d. 1189 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise ( Beaumont) De Bellomont |
| 15 | | | b. 1260 | d. 23 Nov 1183 | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise ( Beaumont) De Bellomont |
| 16 | | | | d. DECEASED | Sir William "Mafonache" FitzRobert, 2nd Earl of Gloucester | Hawise ( Beaumont) De Bellomont |