I'm a little late coming into this, but I just finished reading Victorian County History, The History of Lancaster, Vol. 8, Township Cantsfield, which deals with the Tunstalls of Thurland.Here is what I took from it for my own research.
In 1201, Gilbert de Notton released to Akaris de Austwick all his title of three plough lands in Cantsfield.A year afterwards, Akarias came to an agreement with William de Tunstall and his son Thomas, respecting boundaries and common rights.(Thomas de Tunstall and his brother William occur as witnesses in the Fountains Chartul. [Fol. 157b].) Akarias held the manor of Cantsfield at the beginning of 1208, when a dispute is recorded with Hugh de Morewick.The dispute was settled at the end of the same year by Richard de Heggefild, Godith his wife, Thomas de Tunstall, Maud his wife, Ingrith, John and Akariason one side and Hugh de Morewich on the other.It is probable that Godith, Maud and Ingrith were the daughters and heirs of Akarias de Austwick, John and Arkarias being near of kin and tenants also.
Thomas de Tunstall had a son named William, who in 1241, obtained from Sarah, daughter of Robert de Stanton, a releases of six Oxgans of land in Austwick and two out of five oxgans in Cantsfield.William, son of Thomas de Tunstall, was living in 1246, when Joan widow of Roger de Tunstall claimed dower against him.In the same year he acquired from John de Cansfield seven oxgans of land in Cantsfield, with a further messuage and six oxgangs there, an eighth part of Old Wennington, and land in Wrayton.
A son named John de Tunstall succeeded William de Tunstall. This John de Tunstallwas succeeded, by his son of the same name.The chief messuage of the Tunstall family had been fixed in Cantsfield before 1292.
William, son and heir of John de Tunstall was a minor in 1315, when his wardship, was claimed by John, son of Robert de Harrington.William came into possession of the manor by 1328, and his son William was in possession in 1359.The younger William added the manors of Over Burrow, Nether Burrow and part of Leck to the family estates.This William is probably the William de Tunstall who was a knight of the shire in 1386 and died in 1387.
Sir William Tunstall’s son was Sir Thomas Tunstall, who was already a knight in 1382, and who in 1402, obtained the king’s licence to crenellate his manor of Thurland and to inclose and impark 1,000 acres of meadow, &c., called Fairthwaite.Sir Thomas died in 1415, holding the manor of Cantsfield of John Harrington in socage by rent of 3s. 4d.; also the manors of Tunstall, Burrow and Leck, Newton and Hubberthorn.Sir Thomas’s son and heir was William Tunstall, who was age twenty-four at the time of his death.
~A History of the County of Lancaster: Volume 8, pp. 232-237
William de Tunstall
Thomas de Tunstall living in 1241 = Maud, daughter of Akaris de Austwick
William de Tunstall living in 1246
John de Tunstall
John de Tunstall
Willaim de Tunstall, a minor in the wardship of John de Harrington in 1315, of age by 1328
Sir William de Tunstall, died in 1387
Sir Thomas Thomas Tunstall, died in 1415, married Isabel (or Elizabeth) Harington, daughter of Sir Nicholas Harington