He was great-grandfather of Queen Katherine Parr, the sixth wife of King Henry VIII.
[6] By the time of the War of the Roses, Parr had formed close links with leading Yorkist Richard Neville, 5th Earl of Salisbury and when hostilities began joined him at the Battle of Ludford Bridge near Ludlow in 1459.
After the Yorkists were defeated, he was forced to flee to Calais with Salisbury and was attainted in Parliament, but returned to fight at the Battle of Wakefield in 1460.
His eldest son, William married a granddaughter of the Earl of Salisbury, Elizabeth FitzHugh, and by her was grandfather of Queen Katherine Parr, wife of Henry VIII; his second son, Sir John Parr was made sheriff of Westmorland for life in 1462.
[2] The accession of the Yorkist King Edward IV in 1461 had saved most of Sir Thomas's estates from confiscation.