I found an old thread about Margaret Neville below, illegitimate daughter of Warwick the Kingmaker. She married secondly Lancelot Threlkeld. Lancelot had three daughters (Grace, Elizabeth and Winifred, I think), but was Margaret Neville their mother, or was his first wife, Elizabeth Radcliffe their mother? Opinion seems divided. But it seems the three daughters were born around 1490, after the death of Margaret's first husband in 1485, which certainly makes it possible that she was their mother.
"Sir Richard Hudleston of Millom c.1440-1485
Eldest son of Sir John Hudleston of Millom and Mary Fenwick
marr.1465 Margaret Neville , illegitimate but acknowledged dau. of
Richard Neville, Earl of Warwick, the "Kingmaker" 1428-1471. Her
mother is unknown but may have been a Tilliol, or Moresby (Cu).
The Earl gave Richard and Margaret on their marriage manors at
Blennerhasset and lands at Penrith(Cu) with rents in Coverdale (Y)
Richard thus became brother in law to Richard Duke of Gloucester when
he marr. Anne Neville, dau. of the "Kingmaker" in 1472, his first
cousin. He held many posts under Edward IVth. and Richard IIIrd.
Killed at Bosworth, leaving three children viz:
1. Richard 1476-1503 marr, to Elizabeth Dacre.DSP
2. Margaret b.c.1479 marr. Lancelot Salkeld. Many descendants.
3.Joan b.c.1480 marr. Hugh Fleming. Many descendants including the
Hudlestons of Hutton John.
Margaret Neville/Hudleston marr. 2ndly. Sir Lancelot Threlkeld 2nd. of
Yanwath. She died pre. 1502 and he, pre.1512."