Geni has for the father of Elizabeth Norton (Tempest), John Tempest (1360-1397), the husband of Mary de Clitheroe. According to https://www.wikitree.com/wiki/Tempest-19 he had no descendants. They support their claim by stating it was his brother's children who inherited Studley.
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However, https://www.stirnet.com/genie/data/british/nn/norton02.php and others, do list John as the father of Elizabeth, so
If we say Wikitree is wrong, there is still a problem. If you look at the tree for Elizabeth Norton (Tempest) , you see that her mother's mother Isabel Bourne (Gras) (1325-1421), is the same person as the grandmother of her father, John. Tempest (1360-1397). That seems unlikely..
Going back to Wikitree, https://www.wikitree.com/wiki/Clitheroe-8 they state that Mary de Clitheroe was the step-daughter of Isabel Bourne (Gras) (1325-1421), and that her mother is unknown. If that is correct, it would eliminate some problems.
If John Tempest was the father of Elizabeth Norton (Tempest) , then who was his mother? Geni has Isabel de Gras (1336- 13 Aug 1421) the daughter of Isabel Bourne (Gras) (1325-1421). It seems noteworthy they are listed as both dying on the same day.
https://www.medievalgenealogy.org.uk/families/tempest/tempest3.shtml states they are a number of women said to be the wife of Richard Tempest, the father of John, and concludes the best choice is Margaret Stainforth.
The problems I have:
1) Who is the father of Elizabeth Norton (Tempest)?
2) Who is her mother's mother?
3) If her father was John Tempest, who was his mother?
Stirnet gets it from JW Clay's Dugdale, Volume 2 of 3 page 72, IV
https://archive.org/stream/dugdalesvisitati02dugd_0#page/72/
Note this material is all added by Clay - only the bits in italics are actually from Dugdale's Visitation.
Clay says Richard Norton's wife was a daughter of John Tempest, citing "Glover 156, 319". But this is a slip by Clay - he means William, not John. In fact John isn't mentioned by "Glover" at all.
"Glover" is Clay's way of citing Foster's Yorkshire Visitations (1875), which contains Glover's Visitation of 1584/5 and Richard St George's Visitation of 1612, combined.
Mallory chart, page 156
https://archive.org/details/McGillLibrary-hssl_visitation-yorkshire...
(Isabel is in italics to say she isn't in the copy of Glover, but has been added in by Foster from another source)
Tempest chart, page 319
https://archive.org/details/McGillLibrary-hssl_visitation-yorkshire...
Glover says Richard married ___ and had Piers (wrong) and William. William married ____ and had two co-heiresses who married Mallory and Norton. That;s all Glover knew. Several additions by Foster.
So Elizabeth is actually the same person as Isabel Norton
For better Tempest pedigrees start here
http://www.medievalgenealogy.org.uk/families/ebt/index.shtml
Eleanor quotes deeds stating the parents of Isabel Norton explicitly.
Eleanor Blanche Tempest (Volume 1 page 45) says Isabel was
"daughter and heir of Sir Thomas de Bourne of Stanford Ryvers, co. Essex, knt, by Isabel, daughter and heir of Sir John le Gras of Studley co. York and Trefford co. Dur. knt, by his wife Paulina (see below). She has wrongly been described as "daughter of Sir Hugh Cliderhowe by Isabel le Gras" etc. (Surtees' Hist. of Durham, vol. 3, p.326 etc.)"
Lawsuits are quoted to support this.
Surtees calls Norton's wife Elizabeth here
https://www.british-history.ac.uk/antiquities-durham/vol2/pp40-49
The Surtees reference given by EBT isn't quite right, it's Volume 2 not 3
https://www.british-history.ac.uk/antiquities-durham/vol2/pp303-360...
She's Isabel here, but she's incorrectly shown as a daughter of William junior.
As for Sir William's mother Isabel, Surtees gives two versions. He's probably getting this from collections of old pedigrees compiled by guesswork. In his day, people had a lot of faith in the old pedigrees, because they had no access to most primary sources. Both versions look dodgy, as we know Sir John le Gras left a sole heiress who married Sir Thomas de Bourne.
My head hurts also. Too many people with the same name.
Did you realize that the Isabel Tempest (1387 - 20 Sep 1438) married Richard Norton, and his great-grand parents were a Richard Norton and an Elizabeth Tempest (1287- 20 Sep 1338)
The names being similar, and the dates being the same, except for being a century apart, look suspicious.
False alarm about the wives.
Sir John Tempest of Bracewell had a younger brother Sir Richard who married (1) Joan Hartforth, without issue (2) Isabel de Bourne, daughter and heiress of Isabel le Gras, heiress of Studley. Bracewell and Studley were never in the same hands.
Meanwhile back at the ranch Sir John had a son and heir Richard whose son and heir Richard (d abt 1428-30) married Margaret, probably Stainforth. Somebody said he married Isabel le Gras, and the mistake has refused to die down, that's all.