Oliver was the son of unknown parents. The date and place of his birth have not been found.
He died on 11 APR 1667 in Merrion Castle, Dublin, Ireland.
His wife was Eleanore Holles. They were married, but the date and place have not been found. They had no known children.
| Event | Date | Details | Source | Multimedia | Notes | ||
|---|---|---|---|---|---|---|---|
| Death | 11 APR 1667 |
|
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | earl of Tyrconnell |
Note 1
son of Thomas FitzWilliam, 1st Viscount FitzWilliam (1581-1650) & Margaret Plunkett, daughter of Oliver Plunkett, 4th Baron Louth