I have assumed that James was Geoffrey?s father due to :

In 1496 Geoffrey son of James Stansfield granted to Lawrence Townley (as trustee) the manor of Heysandforth and lands and rents in Worsthorne; Final Conc. iii, 145.
[Geoffrey (d 1500)?s son Giles married the dau of Lawrence Towneley about 1485.)
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James Stansfield occurs in 1443, when it was found that Richard Hoppay, who was sentenced to be hanged for having mortally wounded Robert Hoppay his brother, held two messuages and 6 oxgangs of land in Worsthorne of James; Pal. of Lanc. Plea R. 5, m. 22b. In 1453 James Stansfield the elder of Burnley, Geoffrey Stansfield and others were bound to John Towneley to submit to an arbitration; C 8, 13, S 100, 102. See the History of the Stansfeld Family, by John Stansfeld (1885). The arbitrators decided in favour of the Stansfields, awarding £40, as appears from an acknowledgement for 5 marks, part of that sum, from Geoffrey son of James Stansfield to John Towneley in 1456; ibid. S 83.
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James Stansfield of Heysandforth occurs in 1442.
(VCH re Burnley.)

1. Geoffrey Stansfield