William, Count of Mortain
| William, Count of Mortain | |
|---|---|
| Earl of Cornwall Earl of Kent | |
| Count of Mortain | |
| Reign | 1095 - c. 1140 |
| Predecessor | Robert I |
| Successor | Robert II |
| Born | c. 1084 |
| Died | After 1140 |
| Father | Robert of Mortain |
| Mother | Maud de Montgomery |
William of Mortain (bef. 1084–aft. 1140) was Count of Mortain and the second Earl of Cornwall of 2nd creation.