The word’s primary sense – ‘part of the head on which the hair grows’ (OED I.1.a; c.1300) – is not attested in Anglo-Norman. By extension, the word also referred to a ‘person or individual’ attested in English (MED 2, c.1325).
s.
chalenge a les polles
1lawchallenge to the polls, objection made to the jurymen individually:
(
c.1433
)
le bailly [...] avera chescun challenge a l’arrey et a lez polles come son maister avera etc. ajugé
i 27.22
(
1466
)
purceo lez partiez n’averount lour challenge a l’array entier, mes a lez polles
53.30
(
1469
)
[...] aprés que parcell de l’arraye soit jurrié el serra receu de challenge lez pollez que furent jurré adevaunt
i 72.20
polle1 (c.1433)