From A Wiki of Ice and Fire
|House Harroway of Harrenhal|
|Coat of arms || Per bend sinister orange and sable rayonne, a castle countercharged|
|Seat || Harrenhal|
|Current Lord || Extinct|
|Region || Riverlands|
|Title || Lord of Harrenhal|
|Overlord || House Tully|
|Died out || 44AC|
House Harroway of Harrenhal is an extinct noble house from Harrenhal in Riverlands. According to semi-canon sources they blazoned their arms with per bend sinister orange and black rayonne, a castle countercharged. Lord Harroway's Town is named after a former lord of the house.
House Harroway was the third noble house to rule Harrenhal, receiving the title and lands after the extinction of House Qoherys. The Harroways supported King Maegor I Targaryen in the Battle Beneath the Gods Eye. One of the wives of King Maegor the Cruel was Alys Harroway.
House Harroway was wiped out by Maegor the Cruel in the year 44AC after his wife Alys gave birth to a monstrosity, Lady Tyanna convinced him it proved her infidelity, so the king executed every Harroway he could find.
Harrenhal passed to House Towers after the extinction of the Harroways. 
A Storm of Swords
Sandor Clegane and Arya Stark visit Lord Harroway's Town and find it has been washed out by the overflowing Trident.
A Feast for Crows
Petyr Baelish uses the extinction of House Harroway as an example of the fate of those who claim to own Harrenhal.
References and Notes