|Coat of arms|| An inverted yellow pall between three yellow lions' heads, on a black field|
(Sable, a pall reversed between three lions' heads erased or)
|Current Lord||Antario Jast|
House Jast is a noble house of the Westerlands. The name and location of their keep has not been revealed yet.
According to semi-canon sources their banner is an inverted pall between three lion's heads, yellow on black. Their motto has not been mentioned.
A Clash of Kings
Lord Antario Jast joins the Lannister army mustered by Ser Stafford Lannister. After the Battle of Oxcross, he is reported as having died to Tyrion Lannister in King's Landing. His sons are also captured by the northern army.
A Storm of Swords
A Feast for Crows
Antario is freed at the end of the war. The wounds received and the time he had spent prisoner affect him greatly, leaving him a shadow of the man he had been. Lord Jast joins the group which escorts Lord Tywin Lannister's body from King's Landing back to Casterly Rock. Ser Jaime Lannister sees him armored in black steel, with three gold lion's heads on his breastplate.
House Jast at the end of the third century
The known Jasts during the timespan of the events described in A Song of Ice and Fire are: