Josselin I de Courtenay, Lord of Courtenay, was born 1020 to Aton I de Courtenay (c985-1039) and died 1079 of unspecified causes. He married Hildegarde of Anjou (c1038-c1060) 1054 JL . He married Elizabeth de Montlhery (c1040-) 1065 JL .
Children
| Name | Birth | Death | Joined with |
| Fille de Courteney (c1060-c1107) | 1060 | 1107 | Lisiard le Riche de Paris |
| Hodierne de Courtenay (1062-) | 1062 | Geoffroy II de Joinville (1065-1100) | |
| Etienne de Courtenay (-1101) | |||
| Name | Birth | Death | Joined with |
| Hermengarde de Courtenay (1068-) | 1068 | Renaud II de Joigny (1060-1115) | |
| Miles de Courtenay (c1069-1127) | 1069 | 1127 | Ermengarde de Nevers (1073-1100) |
| Joscelin II de Courtenay (-1131) | |||
Footnotes (including sources)
| ‡ General |