He (John Warren) was found by the inquisition 44th of Edward III, given under Stockport, next heir to Isabel, daughter of Sir Richard de Eton, nephew of his mother Cicely, and at this time was aged 26 years when he succeeded to his estates, and his relationship was further attested by two certificates. In the same year, by the name of John, son of Sir Edward de Garreyn, he gave security to the Earl's escheator to answer for the issues of his Cheshire estates. 54402

Pg 38 (48 of 135) John De Warren, Knight. By the failure of issue male in the family of Eton, Sir John Warren succeeded to the Stokeport estate at the death of his cousin Isabel, d/o Richard Stokeport61642

Pg 319 Sir John De Warren, Knight85125

Pedigree of the Family of Warren-Edward Warren = Cicely De Eaton ch: John Warren, only son = Agnes d/o Richard De Wennington, Knight61642 (other source indicates his son Nicholas married Agnes Winnington? this source doesn’t have Nicholas as a son of this John Warren at all? The children of John on this source are the children of Nicholas and Agnes on the other source?)

Pg 141 Warren:55616 (this source does not have a Sir John Warren s/o Sir Edward Warren, but has this Sir John Warren’s son, Nicholas Warren Married to Agnes Wynnington?)
13. Sir John (3) Warren only s/o Sir Edward (2) Warren & Cicely de Eaton, Marr: Agnes d/o Sir Richard de Wynnington, Knight

Image342 Pg334 Mainwaring, of Over Peover: William Manwaring, of Over Peover was s. by his half-brother, John Manwaring ... the king granted to this John, all the lands and goods of Sir Hugh Browe, which the said Hugh had forfeited by his rebellion, dated 18 August, 4 Henry IV.58665

Image342 Pg33458665 (Who is their father? Descendent of Randolphus?)
Mainwaring, of Over Peover: William Manwaring, of Over Peover ... John Manwaring, his half-bro ...
Mainwaring, of Over Peover: William Manwaring, of Over Peover ... Randle Manwaring, his half-bro

FamilySearch Genealogies indicate that this William Mainwaring’s father is William Mainwaring + Elizabeth Leycester, his Grandfather is William Mainwaring + Mary Davenport (but my records indicate William Mainwaring & Elizabeth Leycester were born @ 1343, 20 years after this John’s potential birth?)