Sybridae

Sybridae or Sybridai ({{langx|grc|Συβρίδαι}}) was a deme of ancient Attica, of the phyle of Erechtheis, sending one delegate every two years, to the Athenian Boule, with Pambotadae sending its delegate in lieu of Sybridae in intervening years.{{cite web|first=Hans|last=Lohmann|publisher=Brill's New Pauly|title=Sybridae

|date=October 2006 |url=https://referenceworks.brillonline.com/entries/brill-s-new-pauly/sybridae-e1126500|accessdate=October 11, 2018}}

Its site is unlocated,{{Cite Barrington|59}} although Pliny the Elder mentions a river Siberus.{{Cite Pliny|37.114}}