The authoritative Complete Peerage, 4 (1916): 93-96 (sub Daubeney) has a good account of the life and ancestry of Sir Ellis (or Elias) d'Aubeney, Lord Daubeney (died 1305), of South Ingleby, Lincolnshire, South Petherton, Somerset, etc., seigneur of Landal in Brittany.
Complete Peerage identifies Lord Daubeney's parents as Sir Ralph d'Aubeney (died 1292), of South Ingleby, Lincolnshire, South Petherton, Barrington, and Chillington, Somerset, etc., seigneur of Landal in Brittany, and his wife, Isabel (living 1294), which Isabel is of unknown parentage.
Recently I (Douglas Richardson, Salt Lake City, Utah) came across an abstract of a lawsuit dated Easter term 1295, between Sir Elias d'Aubeney and John de Wilington, regarding various lands in Lantegulos, Ussa et Fawinton', Cornwall, formerly held by Andrew de Sulney, late kinsman [consanguineus] of Sir Elias d'Aubeney. Sir Elias's exact kinship to Andrew de Sulney is set forth in the lawsuit. Elias' mother, Iseult (or Isolde), is stated to be the
daughter and heiress of Joldewyn [de Sulney], which Joldeyn was the son and heir of John [de Sulney], brother of Ralph [de Sulney], father of Andrew de Sulney.
Thus it would appear that Sir Elias d'Aubeney's mother was Iseult (or Isolde) de Sulney, daughter and heiress of Joldewyn de Sulney. Iseult (or Isolde) de Sulney was evidently the first wife of Sir Ralph d'Aubeney, as Sir Ralph is known to have been survived at his death by a [2nd] wife, Isabel, as stated by Complete Peerage.
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He did homage and had livery of his brother's lands, 26 August 1294. He was in the Army of Wales, in the retinue of William de Valence in 1294,(g) and was sent to Scotland on special affairs by the Earl of Surrey in June 1297. Having been born beyond seas he was naturalized in 1295. He was summoned for Military Service from 16 December 1295 to 7 November 1302, to attend the King at Salisbury, 26 Jan. 1296/7 and to Parliament from 24 June 1295 to 22 January 1304/5, by writs directed Elye de Alblniaco or Daubeny, whereby he is held to have become Lord D'Aubeney.
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ABSTRACT OF LAWSUIT DATED EASTER 1295
Source:
http://www.sd-editions.com/AnaServer?PROMEeg+52760+textframe.anv
Cornub'. Elyas de Albiniaco per attornatum suum petit versus Johannem de Wyllynton' duo mesuagia, centum quaterviginti et quinque acras terre, quaterviginti et duas acras bosci, centum acras more, decem libratas, undecim solidatas et septem denariatas redditus et redditum unius ovis matricis, unius agni, unius hoggastry, unius libre cumini,
unius paris calcarium deauratorum, duorum parium cirotecarum, percussionis ferramenti unius caruce et medietatem unius acre prati cum pertinenciis in Lantegulos, Ussa et Fawinton' de quibus Andreas de Sulny, consangineus predicti Elie, cujus heres ipse est, fuit seisitus
in dominico suo ut de feodo die quo obiit etc. Et unde dicit quod predictus Andreas, consanguineus etc., fuit seisitus de predictis tenementis cum pertinenciis in dominico suo ut de feodo tempore pacis tempore domini \Henrici regis, patris domini/ regis nunc, capiendo inde explecia ad valenciam etc. et inde obiit seisitus etc. Et de ipso Andrea, quia obiit sine herede de se, resorciebatur feodum etc. cuidam Johanni ut avunculo et heredi, fratri cujusdam Radulphi, patris ipsius
Andree; et de ipso Johanne descendit feodum etc. cuidam Joldewyno ut filio et heredi etc.; et de ipso Joldewyno cuidam Isolde ut filie et heredi; et de ipsa Isolda cuidam Philippo ut filio et heredi; et de ipso Philippo, quia obiit sine herede de se, descendit feodum etc. isti Elye qui nunc petit ut fratri et heredi. Et inde producit sectam etc.
Et Johannes per attornatum suum venit. Et dicit quod non debet ei inde respondere quia dicit quod, cum predictus Elyas asserit feodum etc. predictorum tenementorum resortiri de predicto Andrea, de cujus seisina etc., predicto Johanni ut avunculo et heredi, fratri predicti Radulphi
patris etc., idem Radulphus nuncquam aliquem fratrem habuit, Johannem nomine, heredem ipsius Andree, natum sive nutritum, visum aut cognitum infra quatuor maria Anglie. Et de hoc ponit se super patriam; unde petit judicium etc.
Et Elyas dicit quod ipse clamat predicta tenementa ut illa de quibus predictus Andreas, consanguineus etc., obiit seisitus in dominico suo ut de feodo et que predictus Johannes modo tenet, narrando quod de ipso Andrea resorciebatur feodum etc. predicto Johanni ut avunculo et heredi etc. simpliciter absque aliqua adjeccione, quem quidem resortum paratus est verificare sicut curia consideraverit; unde cum de responsione per predictum Johannem facta diversi possunt elici intellectus et sic excepcio sua videtur ambigua, duplex et incerta, petit judicium si excepcio illa in forma qua eam pretendit sit admittenda etc.
Et Johannes, ut prius, dicit quod predictus Radulphus pater etc. nuncquam habuit aliquem fratrem, Johannem nomine, qui visus fuit, natus aut nutritus infra quatuor maria Anglie vel qui heres predicti Andree, de cujus seisina etc., tentus fuit aut cognitus nec eciam predictus Joldewynus, cui predictus Elyas dicit feodum predicti tenementi descendisse ut filio et heredi, visus fuit etc., nutritus aut cognitus.
Et hoc paratus est verificare per patriam; unde, desicut curia ista in hujusmodi casu ulterius non potest nec debet responsionem sive excepcionem aliquam admittere quam illam de qua rei veritas per ipsam curiam poterit inquiri seu cognosci petit judicium etc. Et, si hoc non sufficit, dicet aliud.
Dies datus est eis de audiendo judicio suo hic a die sancti Michaelis in tres septimanas etc."