Ser Danner Upcliff
Ser Danner Upcliff is a bannerman of House Targaryen, despite House Upcliff being a sworn house to House Arryn.It is theorised that Ser Danner may have changed his personal alliance to House Targaryen as Ser Jorah Mormont has done before.
On the books there is no mention of Ser Danner,Being Queen Arwen Upcliff the last documented member of the house.