Abridged from Harpokration s.v. Agryle (sic - the Suda, besides transmitting an odd version of the deme-name itself, changes the headword from the deme-name to the demotikon, on which see n.1 below).
Agryle was one of the six instances of Athenian demes with "upper" and "lower" population centres: see generally D. Whitehead, The Demes of Attica (Princeton 1986) 21.
[1] An illusory piece of chronological information. What Harpok. actually says is: 'the demesmen [is an] Agryleus, but the locative adverb is Agrylethen. (And in fact, the latter is the regular demotikon also.)