From A Wiki of Ice and Fire
| House Tyrell of Brightwater Keep |
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| Seat | Brightwater Keep |
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| Current Lord | Garlan Tyrell |
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| Region | The Reach |
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| Title | Lord of Brightwater Keep |
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| Overlord | House Tyrell of the Reach |
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| Founder | Lord Garlan Tyrell |
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| Founded | +/- 299 AL |
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House Tyrell of Brightwater Keep is a new noble house in the Reach, and a cadet branch of House Tyrell of Highgarden. It was created after House Florent, the ruler of Brightwater Keep, was stripped of lands and titles for rebelling against the Iron Throne. The lands were bestowed on Ser Garlan Tyrell, the second son of Lord Mace Tyrell, for his participation in the Battle of the Blackwater.
The Brightwater Tyrells at the end of the third century
- Lord Garlan Tyrell, called Garlan the Gallant, raised to lordship for his participation in the Battle of the Blackwater.