John, son of Edward de Warren & Cicely de Eton, was born about 1343. He was "found by inquisition 44 Edw.III, given under Stockport, next heir to Isabel, daughter of sir Richard Stockport, & was aged 26 years on succeeding to his estate...In the same year, by the name of John, son of sir Edward le Garreyn, he gave security to the earl's escheator to answer for the issues of his Cheshire estates; occurs as sir John Warren, in a fine 46 Edw.III; & in a lease of Boton, 2 Ric.II & 4 Ric.II, seals with the present arms of the family, checquy, in a canton, a lion rampart. (This lion...was in fact the coat of Maud de Nerford, used as a difference in the arms of Warren.)

"By Inq.14 Ric.II of Isabella de Stathum, given in the account of Stockport, Sir John is found heir to Robert de Eton, & under a settlement 46 Edw.III, reversioner of the manor of Poyngton, which was held immediately of Geoffrey de Poutrell, by the yearly service of 2 shillings, or one sparrow-hawk for all services, in the same manner that the said Geoffrey held by the same services of the king, in capite, for all services. In 8th Rich.II, he grants an annuity of 20s with a robe & hood of the suit given to his esquires to Tho. de Purefey to be paid out of his manor of Rotley, co. Warwick. His will was dated the same year; & dying 10 Rich.II, he was buried at Boton. By his wife Margaret, daughter & heiress of sir John de Stafford of Wickham, in Norfolk, knight, who remarried John Mainwaring, of Over Peover, he had issue Margaret, & Nicholas who was found his heir & aged upwards of 14 years, by inquisition 16 Rich.II. Margaret, his widow, held the manors of Skegton, Boton, Rotley, Plumpton, etc for life."

Comments: Per the PRO, an inquisition post mortem was a local enquiry into the lands held by people of some status, in order to discover whatever income & rights were due to the crown. Such inquisitions were only held when people were thought or known to have held lands of the crown. The escheator was the official holding the inquest. In feudal theory all land belonged to the king & was therefore either held by him, i.e. royal demesne, or of him, whether directly or indirectly. Those who held land directly from the king were known as tenants in chief. When a tenant in chief died, his lands escheated to (fell into the hands of) his lord, the king. If there was no heir, the lands went back to the king's demesne. If there was an heir, the king kept the lands until the heir took possession (livery of seisin) of the lands on payment of a sum of money known as a relief. When the heir was under age, however, the king kept possession until the heir came of age, & received the rights of wardship & marriage (i.e. he collected the revenues of the estate, & could dispose of the heir in marriage). The king was able to sell these rights to third parties, who were only sometimes the next of kin. A male heir had to be 21 & a female, 14, to take possession of their land.

In other words, John was not a knight when he succeeded to his lands at age 26 (ie, 1369 - presumably after Isabel died) but had been knighted by the time he was fined, as recorded in 46 Edw.III (1373, the 46th yr of Edward III's reign). His will was written in 1385 (the 8th yr of Richard II's reign) & he died in 1387 (the 10th yr under Rich.II) at age 44. In 1369 the English & French renewed their on-again-off-again Hundred Years War. I wonder if John de Warren won his knighthood there fighting under Edward's 3rd son, John of Gaunt.