Nicholas Savile was a fairly obscure 4th son, but apparently he now gets a passing mention in Richardson 2013 as an ancestor of William Farrar of Virginia.
He was also an ancestor of General Wolfe (3 lines), Sir Henry Savile Bart, the earls of Mexborough, and the Queen Mother, so he pops up in the Burke-type sources.
He has descents from the Domesday baron Ilbert de Lacy, the Magna Carta baron Roger le Bigod, and allegedly from Hamelin Plantagenet and Isabel de Warenne, if you believe that. Richardson supports the Fitzwilliam-Warenne marriage, but not everybody agrees. Why he doesn't show the lines seems to be unknown.