Thomas Bourne

Isabel le Gras didn't marry Tempest. She married (1) Bourne, with a sole daughter and heiress Isabel de Bourne, who married Tempest, (2) Clitheroe, with no kids. His kids were by an unknown previous wife.

http://www.medievalgenealogy.org.uk/families/ebt/index.shtml Volume 1 page 45

... October 1354 when Sir Richard had re-married Isabel de Bourne (Feet of Fines, Yorks, 29 Edward iij, File 122, no. 6),[otherwise] Isabella (31) 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.)

References

• The Ancestry of Nathan Lewis Harrison Revisited Nineteen Years Later By Keith G. Harrison Pg.286 GoogleBooks

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