A Nicholas de Depeden held land at Depeden in 1300, shown in the Inquisition Post Mortem for Edmund, Earl of Cornwall, quoted below. The timing would be about right for this Nicholas to be the son of the Nicholas de Depeden who paid a fine as a venison offender in 1280.
"1300 Inq. made at Norht Oseneye, 3 Dec. 29 Edw. I [part of entry 604. Edmund, Earl of Cornwall.]
Foreign rents pertaining to the honour of St. Valery in divers counties, viz.--- ...
Southampton. 100s. assised rent of Norht Oseneye, viz.---
Depedene. 1/3 knight's fee held by Nicholas de Depedene, rendering 33s. 4d. yearly; 1/3 knight's fee held by Walter Not, rendering 33s. 4d. yearly; and 1/3 knight's fee held by Richard son of Ralph de Hangre, rendering 33s. 4d. yearly.
Fees &c. pertaining to the honour of St. Valery;---
Southampton. ...
Depedene. 1 fee held by Nicholas de Depedene, Richard de Hanger and Walter Not."
[Calendar of Inquisitions Post Mortem and Other Analogous Documents Preserved in the Public Record Office, Vol. III, First Published 1912, Reprinted 1973, p. 456-479]
Several land transactions of an Adam Depeden occured in Middlesex at about the right time for Adam to have been a younger brother, cousin, or son of this Nicholas.
1317 Middlesex. B. 1982. Grant by John Heroun of London, to Adam de Depedene of that city, of a tenement in the parish of Allhallows, Bredstrete. Witnesses:—John de Wenegrave, mayor, William de Caustone and Ralph de Balauncer, sheriffs, of London, Simon Corp, alderman of that ward, and others. Monday after the Exaltation of the Holy Cross [14 September], 11 Edward II [1317]. Seal. [A Descriptive Catalogue of Ancient Deeds: Volume 2 (1894), pp. 242-253. http://www.british-history.ac.uk/report.aspx?compid=64277]
1322 Middlesex.B. 1973. Grant by Adam de Depedene, to John de Hinetone, both of London, of a tenement in the parish of Allhallows, Bredestrete. Witnesses:—Hamo de Chiggewell, mayor, John do Grantham and Roger de Ely, sheriffs, of London, John de Caustone, alderman of that ward, and others. Thursday the feast of St. Matthew [21 September], 16 Edward II [1322]. Seal. [A Descriptive Catalogue of Ancient Deeds: Volume 2 (1894), pp. 242-253. http://www.british-history.ac.uk/report.aspx?compid=64277]
1324 Middlesex.B. 1974. Release by Margaret, late the wife of Adam Diepedene of London, to John de Hinetone of that city, of her right to a tenement in the parish of Allhallows, Bredestrete. Witnesses:—Hamo de Chiggewelle, mayor, John de Oxonia and Adam de Sar', sheriffs, of London, John de Causton, alderman of that ward, and others. Monday before Midsummerday [summer solstice], 17 Edward II. Seal. [A Descriptive Catalogue of Ancient Deeds: Volume 2 (1894), pp. 242-253. http://www.british-history.ac.uk/report.aspx?compid=64277]